Date   
Re: Creating Gerber files for pcb construction

Diver Martin <diver.martin@...>
 

So noted... I'm gonna have to give them a go for the next revision of my uBitx top modifications... $50 for 10 PCBs vs $105 from DFrobot is a pretty significant price difference...

On Thu, Jan 25, 2018 at 10:05 AM, Laurence Oberman <oberman.l@...> wrote:
So far I have used this vendor and I have only Awesome words for them.
My boards are only double sided but have a combination of SMD and through hole.
I use TIna to create the boards

PCBWAY.COM

On Wed, Jan 24, 2018 at 7:04 PM, Diver Martin <diver.martin@...> wrote:
> Gordon,
>
> I'm very curious about the jclpcb order you made.  How is the PCB quality?
> That's a vendor I wanted to try, but haven't gotten around to.  They offer
> many of the same features as my current pcb house in china (DFRobot) but at
> about half the cost.  Are the boards pictured from jcl or pcbway?
>
> On Wed, Jan 24, 2018 at 3:57 PM, Gordon Gibby <ggibby@...> wrote:
>>
>> First set of boards arrived today -- not sure why they shipped me TEN
>> boards, I only ordered five.
>> This is all new to me.   Soldered in header sockets.   Wished I'da thought
>> of that for ALL the i/o connections.
>>
>> Found at least one error so far -- forgot to ground pin 5 of the LCD
>> display.   Have not soldered in the op amp portion but got the LCD working
>> (after adding little ground wire) and verified that the Adafruit Si5351 is
>> bring controlled --- communications receiver hears  it right where I send
>> its frequency to.
>>
>> This so SO cool.....
>>
>> Can't believe how much this forum has taught me in just a few weeks.
>> This is going to be huge for our local ARES group.   Loads of skills they
>> can learn.
>>
>> Gordon
>>
>> ________________________________________
>> From: BITX20@groups.io <BITX20@groups.io> on behalf of Gordon Gibby
>> <ggibby@...>
>> Sent: Tuesday, January 23, 2018 4:35 PM
>> To: BITX20@groups.io
>> Subject: Re: [BITX20] Creating Gerber files for pcb construction
>>
>> I don't have the exact number, but one company was about $24 (including
>> shipping) and the other company was $28 (including shipping) --- 5 boards
>> each company.   First time customer.
>>
>> ________________________________________
>> From: BITX20@groups.io <BITX20@groups.io> on behalf of B C <k9wis@...>
>> Sent: Tuesday, January 23, 2018 4:19 PM
>> To: BITX20@groups.io
>> Subject: Re: [BITX20] Creating Gerber files for pcb construction
>>
>> what did those boards cost you??
>> Brian K9WIS
>>
>> ---- Gordon Gibby <ggibby@...> wrote:
>> > Thanks to all your suggestions I made two trial orders:
>> >
>> > pcbway.com
>> >
>> > jlcpcb.com
>> >
>> >
>> > About last friday night/saturday.
>> >
>> > The first set is supposed to arrive sometime tomorrow (wednesday)
>> >
>> > and the other set on Thursday.   amazing.
>> >
>> >
>> > Fingers crossed that I did this correctly!!!
>> >
>> >
>> > Showed this project to my youngest son (working as a new auto mechanic)
>> > and he was motivated to get out the christmas arduino kit I gave him and
>> > immediately started building LED circuits....astonishing my wife and
>> > me....may help him out in life.
>> >
>> >
>> >
>> >
>> > ________________________________
>> > From: BITX20@groups.io <BITX20@groups.io> on behalf of Gordon Gibby
>> > <ggibby@...>
>> > Sent: Sunday, January 21, 2018 12:09 AM
>> > To: BITX20@groups.io
>> > Subject: Re: [BITX20] Creating Gerber files for pcb construction
>> >
>> >
>> > Thanks for yet another great suggestion.
>> >
>> >
>> > I have now created a "flying jumpers" breadboard version using a couple
>> > of different resistive bridge designs --- the K6BEZ design driven by the
>> > Si5351 directly  didn't produce enough voltage to make the reverse
>> > measurement accurate and I gave up after several hours on that.   Would need
>> > to add an amplification stage I believe...   The easy swr indicator kit from
>> > https://urldefense.proofpoint.com/v2/url?u=http-3A__www.qrpkits.com_ezseries.html-23ezswr&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=wATr3kl2cd5RzPMIGfxbDzykiABvusgbH-fnLXPAkSA&e=<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.qrpkits.com_ezseries.html-23ezswr&d=DwMFAw&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=McWMTsaWY88BIHjI9RhDX8BXq0BroHl6MaH6P7zGTVo&s=iOg3ff6bkbrqV9BQbMsupWJHkEUhFqFcHTVOepLM0YM&e=>
>> > (no LED, just take the rectified voltage and run into an op amp with a gain
>> > of about 6)  produced a voltage that seemed to work.   My circuit is sorta
>> > haywire (with egloo jumpers everywhere) and the pcb version would be FAR
>> > MORE STABLE but I'm able to measure  shorts, 25 ohm, 50 ohm, 100 ohm, 220
>> > ohm and open circuit and get  "sorta close SWR" measurements at frequencies
>> > up to maybe 30 MHz.   There is so much haywiredness to the breadboard that I
>> > can't make any better observations at the moment.   The PCB should be a ton
>> > more mechanically stable.  Earlier today I put it on a real antenna and it
>> > did find the resonance.
>> >
>> >
>> > A friend is working on the "single meter" SWR version using a toroidial
>> > swr measurement head (which I also have built and should also work).   The
>> > goal there is to emulate the $129 LDG big meter display of SWR.....    The
>> > pcb that I cranked out (and now being built in China, fingers crossed!)
>> > should work with both.   (2 different inputs).
>> >
>> >
>> > You folks are a lot brighter at this stuff than I am but it has been a
>> > ton of fun just getting this much to work!  I think this is going to be a
>> > great building project for our ARES group.
>> >
>> >
>> >
>> >
>> >
>> >
>> > ________________________________
>> > From: BITX20@groups.io <BITX20@groups.io> on behalf of William R Maxwell
>> > <wrmaxwell@...>
>> > Sent: Saturday, January 20, 2018 5:02 PM
>> > To: BITX20@groups.io
>> > Subject: Re: [BITX20] Creating Gerber files for pcb construction
>> >
>> >
>> > Another to consider is
>> > www.jlcpcb.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.jlcpcb.com&d=DwMF-g&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=IdE0tYxjCfc0L_NPXEC5rll-igwhgt6ppqTzraUYlNc&s=WtrSAHHYrh1yu_YDRixyHaUjQzv0a3Hp9-zY2b8fanM&e=>.
>> > I have just received 10 boards for a mere $2 total, including DHL shipping.
>> > Note the there is a sixe limit of 100mmx100mm, and two layers, green solder
>> > resist and 1.6mm material.
>> >
>> > This offer I think is limited to your initial order. A subsequent set of
>> > 3 boards, 10 copies each, cost me $29, including shipping.
>> >
>> > Bill, VK7MX
>> >
>> > On 21/01/2018 12:38 AM, Gordon Gibby wrote:
>> > Wow!!! Thank you for that wonderful tip.
>> >
>> > Sent from my iPhone
>> >
>> > On Jan 20, 2018, at 06:51, Kerr Smith
>> > <kerrsmithusa@...<mailto:kerrsmithusa@...>> wrote:
>> >
>> > Have you looked at PCB Shopper? You just set the size of your PCB and
>> > how any boards you require and it will list all the main PCB fabrication
>> > sites and how much it will cost:
>> >
>> >
>> > https://urldefense.proofpoint.com/v2/url?u=https-3A__pcbshopper.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=0xNqpq13ii9aT1Sh5iz_prDuqOsArD7fo-GvxVduS2A&e=<https://urldefense.proofpoint.com/v2/url?u=https-3A__pcbshopper.com&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=x1CZZZOSFNIXEjRrVRTlehkNhcaChUif1k7nsMKwx4Q&e=>
>> >
>> > For my latest PCBs I tried AllPCB and was extremely pleased with the
>> > results, they had an offer on at the time so for $5 I got 7 boards on one
>> > order and for my second $5 order I got 17 boards (if your boards are small
>> > they seem to add in extra to your order) - they were all shipped using TNT
>> > and arrived in just 5 days. At the current time the total cost is $12 for 5
>> > boards up to 35mm x 35mm with free TNT shipping:
>> >
>> >
>> > https://urldefense.proofpoint.com/v2/url?u=http-3A__www.allpcb.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=XnTdlYHqFlKmjNeCLrFl6eNp9UdCG5Xzx2kDDYXCyOg&e=<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.allpcb.com_setinvite.aspx-3Finviteid-3D30276-26url-3Dhttp-3A__www.allpcb.com_online-5Fquote.html&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=VRALDmdsziyoxueeKz6mXPEvcc6DHC3hcVq_mlvqGIo&e=>
>> >
>> > The other site I would recommend is OSHPark:
>> >
>> >
>> > https://urldefense.proofpoint.com/v2/url?u=https-3A__oshpark.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=z3OHoUEftZQXgilq__PmOkVk9mUQmTqOuH12jAGHT0c&e=<https://urldefense.proofpoint.com/v2/url?u=https-3A__oshpark.com_&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=dqHZt9-lgSwySoNuMqvHedfU_5GT-Uu8usvQgbFEknc&e=>
>> >
>> > They are the ones who do the purple PCBs which look really great and
>> > also pretty cheap, only a few dollars (around $9.50) for three 35mm x 35mm
>> > boards with shipping included.
>> >
>> > I am so pleased that the price for creating PCBs yourself is now this
>> > low, up until now I have been carefully making my own by etching them but
>> > now I can get them in a few days if I need them fast or a couple of weeks if
>> > I don't mind waiting. There are so many different fabrication sites there is
>> > always going to be a great deal to be had if you shop around a bit, the PCB
>> > Shopper site I mentioned above is really great for this.
>> >
>> >
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
> --
> Martin Held - AE7EU
> http://ae7eu.com/
> -------------------------------------------------------------------------------
> If there aren't any questions, then what is there to learn?
>






--
Martin Held - AE7EU
http://ae7eu.com/
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?

Re: Creating Gerber files for pcb construction

Laurence Oberman
 

Here is my 10Mhz oven controlled reference I designed.
This is from pcbway and is one with all though hole.

On Thu, Jan 25, 2018 at 1:16 PM, Diver Martin <diver.martin@...> wrote:
So noted... I'm gonna have to give them a go for the next revision of my
uBitx top modifications... $50 for 10 PCBs vs $105 from DFrobot is a pretty
significant price difference...

On Thu, Jan 25, 2018 at 10:05 AM, Laurence Oberman <oberman.l@...>
wrote:

So far I have used this vendor and I have only Awesome words for them.
My boards are only double sided but have a combination of SMD and through
hole.
I use TIna to create the boards

PCBWAY.COM

On Wed, Jan 24, 2018 at 7:04 PM, Diver Martin <diver.martin@...>
wrote:
Gordon,

I'm very curious about the jclpcb order you made. How is the PCB
quality?
That's a vendor I wanted to try, but haven't gotten around to. They
offer
many of the same features as my current pcb house in china (DFRobot) but
at
about half the cost. Are the boards pictured from jcl or pcbway?

On Wed, Jan 24, 2018 at 3:57 PM, Gordon Gibby <ggibby@...>
wrote:

First set of boards arrived today -- not sure why they shipped me TEN
boards, I only ordered five.
This is all new to me. Soldered in header sockets. Wished I'da
thought
of that for ALL the i/o connections.

Found at least one error so far -- forgot to ground pin 5 of the LCD
display. Have not soldered in the op amp portion but got the LCD
working
(after adding little ground wire) and verified that the Adafruit Si5351
is
bring controlled --- communications receiver hears it right where I
send
its frequency to.

This so SO cool.....

Can't believe how much this forum has taught me in just a few weeks.
This is going to be huge for our local ARES group. Loads of skills
they
can learn.

Gordon

________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Gordon Gibby
<ggibby@...>
Sent: Tuesday, January 23, 2018 4:35 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction

I don't have the exact number, but one company was about $24 (including
shipping) and the other company was $28 (including shipping) --- 5
boards
each company. First time customer.

________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of B C
<k9wis@...>
Sent: Tuesday, January 23, 2018 4:19 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction

what did those boards cost you??
Brian K9WIS

---- Gordon Gibby <ggibby@...> wrote:
Thanks to all your suggestions I made two trial orders:

pcbway.com

jlcpcb.com


About last friday night/saturday.

The first set is supposed to arrive sometime tomorrow (wednesday)

and the other set on Thursday. amazing.


Fingers crossed that I did this correctly!!!


Showed this project to my youngest son (working as a new auto
mechanic)
and he was motivated to get out the christmas arduino kit I gave him
and
immediately started building LED circuits....astonishing my wife and
me....may help him out in life.




________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Gordon Gibby
<ggibby@...>
Sent: Sunday, January 21, 2018 12:09 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction


Thanks for yet another great suggestion.


I have now created a "flying jumpers" breadboard version using a
couple
of different resistive bridge designs --- the K6BEZ design driven by
the
Si5351 directly didn't produce enough voltage to make the reverse
measurement accurate and I gave up after several hours on that.
Would need
to add an amplification stage I believe... The easy swr indicator
kit from

https://urldefense.proofpoint.com/v2/url?u=http-3A__www.qrpkits.com_ezseries.html-23ezswr&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=wATr3kl2cd5RzPMIGfxbDzykiABvusgbH-fnLXPAkSA&e=<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.qrpkits.com_ezseries.html-23ezswr&d=DwMFAw&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=McWMTsaWY88BIHjI9RhDX8BXq0BroHl6MaH6P7zGTVo&s=iOg3ff6bkbrqV9BQbMsupWJHkEUhFqFcHTVOepLM0YM&e=>
(no LED, just take the rectified voltage and run into an op amp with
a gain
of about 6) produced a voltage that seemed to work. My circuit is
sorta
haywire (with egloo jumpers everywhere) and the pcb version would be
FAR
MORE STABLE but I'm able to measure shorts, 25 ohm, 50 ohm, 100 ohm,
220
ohm and open circuit and get "sorta close SWR" measurements at
frequencies
up to maybe 30 MHz. There is so much haywiredness to the breadboard
that I
can't make any better observations at the moment. The PCB should be
a ton
more mechanically stable. Earlier today I put it on a real antenna
and it
did find the resonance.


A friend is working on the "single meter" SWR version using a
toroidial
swr measurement head (which I also have built and should also work).
The
goal there is to emulate the $129 LDG big meter display of SWR.....
The
pcb that I cranked out (and now being built in China, fingers
crossed!)
should work with both. (2 different inputs).


You folks are a lot brighter at this stuff than I am but it has been
a
ton of fun just getting this much to work! I think this is going to
be a
great building project for our ARES group.






________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of William R
Maxwell
<wrmaxwell@...>
Sent: Saturday, January 20, 2018 5:02 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction


Another to consider is

www.jlcpcb.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.jlcpcb.com&d=DwMF-g&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=IdE0tYxjCfc0L_NPXEC5rll-igwhgt6ppqTzraUYlNc&s=WtrSAHHYrh1yu_YDRixyHaUjQzv0a3Hp9-zY2b8fanM&e=>.
I have just received 10 boards for a mere $2 total, including DHL
shipping.
Note the there is a sixe limit of 100mmx100mm, and two layers, green
solder
resist and 1.6mm material.

This offer I think is limited to your initial order. A subsequent set
of
3 boards, 10 copies each, cost me $29, including shipping.

Bill, VK7MX

On 21/01/2018 12:38 AM, Gordon Gibby wrote:
Wow!!! Thank you for that wonderful tip.

Sent from my iPhone

On Jan 20, 2018, at 06:51, Kerr Smith
<kerrsmithusa@...<mailto:kerrsmithusa@...>> wrote:

Have you looked at PCB Shopper? You just set the size of your PCB and
how any boards you require and it will list all the main PCB
fabrication
sites and how much it will cost:



https://urldefense.proofpoint.com/v2/url?u=https-3A__pcbshopper.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=0xNqpq13ii9aT1Sh5iz_prDuqOsArD7fo-GvxVduS2A&e=<https://urldefense.proofpoint.com/v2/url?u=https-3A__pcbshopper.com&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=x1CZZZOSFNIXEjRrVRTlehkNhcaChUif1k7nsMKwx4Q&e=>

For my latest PCBs I tried AllPCB and was extremely pleased with the
results, they had an offer on at the time so for $5 I got 7 boards on
one
order and for my second $5 order I got 17 boards (if your boards are
small
they seem to add in extra to your order) - they were all shipped
using TNT
and arrived in just 5 days. At the current time the total cost is $12
for 5
boards up to 35mm x 35mm with free TNT shipping:



https://urldefense.proofpoint.com/v2/url?u=http-3A__www.allpcb.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=XnTdlYHqFlKmjNeCLrFl6eNp9UdCG5Xzx2kDDYXCyOg&e=<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.allpcb.com_setinvite.aspx-3Finviteid-3D30276-26url-3Dhttp-3A__www.allpcb.com_online-5Fquote.html&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=VRALDmdsziyoxueeKz6mXPEvcc6DHC3hcVq_mlvqGIo&e=>

The other site I would recommend is OSHPark:



https://urldefense.proofpoint.com/v2/url?u=https-3A__oshpark.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=z3OHoUEftZQXgilq__PmOkVk9mUQmTqOuH12jAGHT0c&e=<https://urldefense.proofpoint.com/v2/url?u=https-3A__oshpark.com_&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=dqHZt9-lgSwySoNuMqvHedfU_5GT-Uu8usvQgbFEknc&e=>

They are the ones who do the purple PCBs which look really great and
also pretty cheap, only a few dollars (around $9.50) for three 35mm x
35mm
boards with shipping included.

I am so pleased that the price for creating PCBs yourself is now this
low, up until now I have been carefully making my own by etching them
but
now I can get them in a few days if I need them fast or a couple of
weeks if
I don't mind waiting. There are so many different fabrication sites
there is
always going to be a great deal to be had if you shop around a bit,
the PCB
Shopper site I mentioned above is really great for this.













--
Martin Held - AE7EU
http://ae7eu.com/

-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?



--
Martin Held - AE7EU
http://ae7eu.com/
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?

Re: On-Off Switch on Volume Control will not turn on. #parts

Al Duncan VE3RRD
 

I used a separate power switch, that way I can use a normal volume pot with 1/4 inch shaft if I wish. Also means that if pot gets noisy, I only have to replace with another audio pot.
AL VE3RRD

Re: Creating Gerber files for pcb construction

Gordon Gibby
 

that looks really nice! where did you get that ovenoscillator?


________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Laurence Oberman <oberman.l@...>
Sent: Thursday, January 25, 2018 1:26 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction

Here is my 10Mhz oven controlled reference I designed.
This is from pcbway and is one with all though hole.

On Thu, Jan 25, 2018 at 1:16 PM, Diver Martin <diver.martin@...> wrote:
So noted... I'm gonna have to give them a go for the next revision of my
uBitx top modifications... $50 for 10 PCBs vs $105 from DFrobot is a pretty
significant price difference...

On Thu, Jan 25, 2018 at 10:05 AM, Laurence Oberman <oberman.l@...>
wrote:

So far I have used this vendor and I have only Awesome words for them.
My boards are only double sided but have a combination of SMD and through
hole.
I use TIna to create the boards

PCBWAY.COM

On Wed, Jan 24, 2018 at 7:04 PM, Diver Martin <diver.martin@...>
wrote:
Gordon,

I'm very curious about the jclpcb order you made. How is the PCB
quality?
That's a vendor I wanted to try, but haven't gotten around to. They
offer
many of the same features as my current pcb house in china (DFRobot) but
at
about half the cost. Are the boards pictured from jcl or pcbway?

On Wed, Jan 24, 2018 at 3:57 PM, Gordon Gibby <ggibby@...>
wrote:

First set of boards arrived today -- not sure why they shipped me TEN
boards, I only ordered five.
This is all new to me. Soldered in header sockets. Wished I'da
thought
of that for ALL the i/o connections.

Found at least one error so far -- forgot to ground pin 5 of the LCD
display. Have not soldered in the op amp portion but got the LCD
working
(after adding little ground wire) and verified that the Adafruit Si5351
is
bring controlled --- communications receiver hears it right where I
send
its frequency to.

This so SO cool.....

Can't believe how much this forum has taught me in just a few weeks.
This is going to be huge for our local ARES group. Loads of skills
they
can learn.

Gordon

________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Gordon Gibby
<ggibby@...>
Sent: Tuesday, January 23, 2018 4:35 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction

I don't have the exact number, but one company was about $24 (including
shipping) and the other company was $28 (including shipping) --- 5
boards
each company. First time customer.

________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of B C
<k9wis@...>
Sent: Tuesday, January 23, 2018 4:19 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction

what did those boards cost you??
Brian K9WIS

---- Gordon Gibby <ggibby@...> wrote:
Thanks to all your suggestions I made two trial orders:

pcbway.com

jlcpcb.com


About last friday night/saturday.

The first set is supposed to arrive sometime tomorrow (wednesday)

and the other set on Thursday. amazing.


Fingers crossed that I did this correctly!!!


Showed this project to my youngest son (working as a new auto
mechanic)
and he was motivated to get out the christmas arduino kit I gave him
and
immediately started building LED circuits....astonishing my wife and
me....may help him out in life.




________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Gordon Gibby
<ggibby@...>
Sent: Sunday, January 21, 2018 12:09 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction


Thanks for yet another great suggestion.


I have now created a "flying jumpers" breadboard version using a
couple
of different resistive bridge designs --- the K6BEZ design driven by
the
Si5351 directly didn't produce enough voltage to make the reverse
measurement accurate and I gave up after several hours on that.
Would need
to add an amplification stage I believe... The easy swr indicator
kit from

https://urldefense.proofpoint.com/v2/url?u=http-3A__www.qrpkits.com_ezseries.html-23ezswr&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=wATr3kl2cd5RzPMIGfxbDzykiABvusgbH-fnLXPAkSA&e=<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.qrpkits.com_ezseries.html-23ezswr&d=DwMFAw&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=McWMTsaWY88BIHjI9RhDX8BXq0BroHl6MaH6P7zGTVo&s=iOg3ff6bkbrqV9BQbMsupWJHkEUhFqFcHTVOepLM0YM&e=>
(no LED, just take the rectified voltage and run into an op amp with
a gain
of about 6) produced a voltage that seemed to work. My circuit is
sorta
haywire (with egloo jumpers everywhere) and the pcb version would be
FAR
MORE STABLE but I'm able to measure shorts, 25 ohm, 50 ohm, 100 ohm,
220
ohm and open circuit and get "sorta close SWR" measurements at
frequencies
up to maybe 30 MHz. There is so much haywiredness to the breadboard
that I
can't make any better observations at the moment. The PCB should be
a ton
more mechanically stable. Earlier today I put it on a real antenna
and it
did find the resonance.


A friend is working on the "single meter" SWR version using a
toroidial
swr measurement head (which I also have built and should also work).
The
goal there is to emulate the $129 LDG big meter display of SWR.....
The
pcb that I cranked out (and now being built in China, fingers
crossed!)
should work with both. (2 different inputs).


You folks are a lot brighter at this stuff than I am but it has been
a
ton of fun just getting this much to work! I think this is going to
be a
great building project for our ARES group.






________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of William R
Maxwell
<wrmaxwell@...>
Sent: Saturday, January 20, 2018 5:02 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction


Another to consider is

www.jlcpcb.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.jlcpcb.com&d=DwMF-g&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=IdE0tYxjCfc0L_NPXEC5rll-igwhgt6ppqTzraUYlNc&s=WtrSAHHYrh1yu_YDRixyHaUjQzv0a3Hp9-zY2b8fanM&e=>.
I have just received 10 boards for a mere $2 total, including DHL
shipping.
Note the there is a sixe limit of 100mmx100mm, and two layers, green
solder
resist and 1.6mm material.

This offer I think is limited to your initial order. A subsequent set
of
3 boards, 10 copies each, cost me $29, including shipping.

Bill, VK7MX

On 21/01/2018 12:38 AM, Gordon Gibby wrote:
Wow!!! Thank you for that wonderful tip.

Sent from my iPhone

On Jan 20, 2018, at 06:51, Kerr Smith
<kerrsmithusa@...<mailto:kerrsmithusa@...>> wrote:

Have you looked at PCB Shopper? You just set the size of your PCB and
how any boards you require and it will list all the main PCB
fabrication
sites and how much it will cost:



https://urldefense.proofpoint.com/v2/url?u=https-3A__pcbshopper.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=0xNqpq13ii9aT1Sh5iz_prDuqOsArD7fo-GvxVduS2A&e=<https://urldefense.proofpoint.com/v2/url?u=https-3A__pcbshopper.com&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=x1CZZZOSFNIXEjRrVRTlehkNhcaChUif1k7nsMKwx4Q&e=>

For my latest PCBs I tried AllPCB and was extremely pleased with the
results, they had an offer on at the time so for $5 I got 7 boards on
one
order and for my second $5 order I got 17 boards (if your boards are
small
they seem to add in extra to your order) - they were all shipped
using TNT
and arrived in just 5 days. At the current time the total cost is $12
for 5
boards up to 35mm x 35mm with free TNT shipping:



https://urldefense.proofpoint.com/v2/url?u=http-3A__www.allpcb.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=XnTdlYHqFlKmjNeCLrFl6eNp9UdCG5Xzx2kDDYXCyOg&e=<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.allpcb.com_setinvite.aspx-3Finviteid-3D30276-26url-3Dhttp-3A__www.allpcb.com_online-5Fquote.html&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=VRALDmdsziyoxueeKz6mXPEvcc6DHC3hcVq_mlvqGIo&e=>

The other site I would recommend is OSHPark:



https://urldefense.proofpoint.com/v2/url?u=https-3A__oshpark.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=z3OHoUEftZQXgilq__PmOkVk9mUQmTqOuH12jAGHT0c&e=<https://urldefense.proofpoint.com/v2/url?u=https-3A__oshpark.com_&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=dqHZt9-lgSwySoNuMqvHedfU_5GT-Uu8usvQgbFEknc&e=>

They are the ones who do the purple PCBs which look really great and
also pretty cheap, only a few dollars (around $9.50) for three 35mm x
35mm
boards with shipping included.

I am so pleased that the price for creating PCBs yourself is now this
low, up until now I have been carefully making my own by etching them
but
now I can get them in a few days if I need them fast or a couple of
weeks if
I don't mind waiting. There are so many different fabrication sites
there is
always going to be a great deal to be had if you shop around a bit,
the PCB
Shopper site I mentioned above is really great for this.













--
Martin Held - AE7EU
https://urldefense.proofpoint.com/v2/url?u=http-3A__ae7eu.com_&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=-9Z3g0vluuAZ0CwES9hIC_mm66MMSd_8VeEp-4eRYCc&s=GWju2OkfT3ab0H3ltBYwBafVdUS0pvf1njJ1I2zbbiI&e=

-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?



--
Martin Held - AE7EU
https://urldefense.proofpoint.com/v2/url?u=http-3A__ae7eu.com_&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=-9Z3g0vluuAZ0CwES9hIC_mm66MMSd_8VeEp-4eRYCc&s=GWju2OkfT3ab0H3ltBYwBafVdUS0pvf1njJ1I2zbbiI&e=
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?

Re: SMD Group Build

Jack Purdum
 

Wish I had seen these before!

Thanks!

Jack, W8TEE



From: Clark Martin <kk6isp@...>
To: BITX20@groups.io
Sent: Thursday, January 25, 2018 1:59 AM
Subject: Re: [BITX20] SMD Group Build

IIRC this is the place where I bought SMD parts some time ago.  They still have the day planner hole pattern.  I find that very convenient.  I put the resistors and caps in one binder and whenever I need one I just go leafing through it.

0805 SMD Resistor Kit 80 Value Total 2000 Pieces Surface mount - MDFLY






Clark Martin
KK6ISP

On Jan 24, 2018, at 9:23 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:

I wish someone would put together an assortment of, say, 40 common values, quantity 100 of each value and market it for some reasonable markup for resistors and caps. For the club build, I'd prefer 1206 since this is a huge step for some of the club members. 

BTW, today I just got 40 clear plastic 1.25"x0.75" cosmetic sample jars (eBay #332506418787). Tomorrow I'm going to Target and buy Velcro sticky tape "dots" and place one half on the bottom of the jar, and the other on a piece of plywood which hangs on the wall. Now if somebody has an assortment of 40 common values, they go into the jar and I'm ready to go. Each jar will have a small Avery label on it.





Re: SMD Group Build

Jack Purdum
 

All:

I got many good responses to my request for help, as is normally the case here. To all...thank you!

Jack, W8TEE

Re: Multi band Radiuno V2.0x

Steve MW0KST
 

Many thanks all for the helpful comments and ideas. Yes, I think the 2 pole rotary switch and A2 is the way to go. Now then, where's my Arduino instruction book..?

73 Steve MW0KST. 

Re: Creating Gerber files for pcb construction

Gordon Gibby
 

The JLPCB boards arrived today. Five boards, exactly as I ordered, and an unusual cardboard based ink pen of some sort.

The boards look wonderful, and basically identical to the ones from pcbway except each company seems to put some tiny identification silkscreen in slightly different places on the boards. Of course, they have exactly the same error (pin 5 left ungrounded on the LCD) that I made in the artwork for the other company as well Easily dealt with.

Gordon


________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Gordon Gibby <ggibby@...>
Sent: Thursday, January 25, 2018 1:40 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction

that looks really nice! where did you get that ovenoscillator?


________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Laurence Oberman <oberman.l@...>
Sent: Thursday, January 25, 2018 1:26 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction

Here is my 10Mhz oven controlled reference I designed.
This is from pcbway and is one with all though hole.

On Thu, Jan 25, 2018 at 1:16 PM, Diver Martin <diver.martin@...> wrote:
So noted... I'm gonna have to give them a go for the next revision of my
uBitx top modifications... $50 for 10 PCBs vs $105 from DFrobot is a pretty
significant price difference...

On Thu, Jan 25, 2018 at 10:05 AM, Laurence Oberman <oberman.l@...>
wrote:

So far I have used this vendor and I have only Awesome words for them.
My boards are only double sided but have a combination of SMD and through
hole.
I use TIna to create the boards

PCBWAY.COM

On Wed, Jan 24, 2018 at 7:04 PM, Diver Martin <diver.martin@...>
wrote:
Gordon,

I'm very curious about the jclpcb order you made. How is the PCB
quality?
That's a vendor I wanted to try, but haven't gotten around to. They
offer
many of the same features as my current pcb house in china (DFRobot) but
at
about half the cost. Are the boards pictured from jcl or pcbway?

On Wed, Jan 24, 2018 at 3:57 PM, Gordon Gibby <ggibby@...>
wrote:

First set of boards arrived today -- not sure why they shipped me TEN
boards, I only ordered five.
This is all new to me. Soldered in header sockets. Wished I'da
thought
of that for ALL the i/o connections.

Found at least one error so far -- forgot to ground pin 5 of the LCD
display. Have not soldered in the op amp portion but got the LCD
working
(after adding little ground wire) and verified that the Adafruit Si5351
is
bring controlled --- communications receiver hears it right where I
send
its frequency to.

This so SO cool.....

Can't believe how much this forum has taught me in just a few weeks.
This is going to be huge for our local ARES group. Loads of skills
they
can learn.

Gordon

________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Gordon Gibby
<ggibby@...>
Sent: Tuesday, January 23, 2018 4:35 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction

I don't have the exact number, but one company was about $24 (including
shipping) and the other company was $28 (including shipping) --- 5
boards
each company. First time customer.

________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of B C
<k9wis@...>
Sent: Tuesday, January 23, 2018 4:19 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction

what did those boards cost you??
Brian K9WIS

---- Gordon Gibby <ggibby@...> wrote:
Thanks to all your suggestions I made two trial orders:

pcbway.com

jlcpcb.com


About last friday night/saturday.

The first set is supposed to arrive sometime tomorrow (wednesday)

and the other set on Thursday. amazing.


Fingers crossed that I did this correctly!!!


Showed this project to my youngest son (working as a new auto
mechanic)
and he was motivated to get out the christmas arduino kit I gave him
and
immediately started building LED circuits....astonishing my wife and
me....may help him out in life.




________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Gordon Gibby
<ggibby@...>
Sent: Sunday, January 21, 2018 12:09 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction


Thanks for yet another great suggestion.


I have now created a "flying jumpers" breadboard version using a
couple
of different resistive bridge designs --- the K6BEZ design driven by
the
Si5351 directly didn't produce enough voltage to make the reverse
measurement accurate and I gave up after several hours on that.
Would need
to add an amplification stage I believe... The easy swr indicator
kit from

https://urldefense.proofpoint.com/v2/url?u=http-3A__www.qrpkits.com_ezseries.html-23ezswr&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=wATr3kl2cd5RzPMIGfxbDzykiABvusgbH-fnLXPAkSA&e=<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.qrpkits.com_ezseries.html-23ezswr&d=DwMFAw&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=McWMTsaWY88BIHjI9RhDX8BXq0BroHl6MaH6P7zGTVo&s=iOg3ff6bkbrqV9BQbMsupWJHkEUhFqFcHTVOepLM0YM&e=>
(no LED, just take the rectified voltage and run into an op amp with
a gain
of about 6) produced a voltage that seemed to work. My circuit is
sorta
haywire (with egloo jumpers everywhere) and the pcb version would be
FAR
MORE STABLE but I'm able to measure shorts, 25 ohm, 50 ohm, 100 ohm,
220
ohm and open circuit and get "sorta close SWR" measurements at
frequencies
up to maybe 30 MHz. There is so much haywiredness to the breadboard
that I
can't make any better observations at the moment. The PCB should be
a ton
more mechanically stable. Earlier today I put it on a real antenna
and it
did find the resonance.


A friend is working on the "single meter" SWR version using a
toroidial
swr measurement head (which I also have built and should also work).
The
goal there is to emulate the $129 LDG big meter display of SWR.....
The
pcb that I cranked out (and now being built in China, fingers
crossed!)
should work with both. (2 different inputs).


You folks are a lot brighter at this stuff than I am but it has been
a
ton of fun just getting this much to work! I think this is going to
be a
great building project for our ARES group.






________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of William R
Maxwell
<wrmaxwell@...>
Sent: Saturday, January 20, 2018 5:02 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction


Another to consider is

www.jlcpcb.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.jlcpcb.com&d=DwMF-g&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=IdE0tYxjCfc0L_NPXEC5rll-igwhgt6ppqTzraUYlNc&s=WtrSAHHYrh1yu_YDRixyHaUjQzv0a3Hp9-zY2b8fanM&e=>.
I have just received 10 boards for a mere $2 total, including DHL
shipping.
Note the there is a sixe limit of 100mmx100mm, and two layers, green
solder
resist and 1.6mm material.

This offer I think is limited to your initial order. A subsequent set
of
3 boards, 10 copies each, cost me $29, including shipping.

Bill, VK7MX

On 21/01/2018 12:38 AM, Gordon Gibby wrote:
Wow!!! Thank you for that wonderful tip.

Sent from my iPhone

On Jan 20, 2018, at 06:51, Kerr Smith
<kerrsmithusa@...<mailto:kerrsmithusa@...>> wrote:

Have you looked at PCB Shopper? You just set the size of your PCB and
how any boards you require and it will list all the main PCB
fabrication
sites and how much it will cost:



https://urldefense.proofpoint.com/v2/url?u=https-3A__pcbshopper.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=0xNqpq13ii9aT1Sh5iz_prDuqOsArD7fo-GvxVduS2A&e=<https://urldefense.proofpoint.com/v2/url?u=https-3A__pcbshopper.com&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=x1CZZZOSFNIXEjRrVRTlehkNhcaChUif1k7nsMKwx4Q&e=>

For my latest PCBs I tried AllPCB and was extremely pleased with the
results, they had an offer on at the time so for $5 I got 7 boards on
one
order and for my second $5 order I got 17 boards (if your boards are
small
they seem to add in extra to your order) - they were all shipped
using TNT
and arrived in just 5 days. At the current time the total cost is $12
for 5
boards up to 35mm x 35mm with free TNT shipping:



https://urldefense.proofpoint.com/v2/url?u=http-3A__www.allpcb.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=XnTdlYHqFlKmjNeCLrFl6eNp9UdCG5Xzx2kDDYXCyOg&e=<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.allpcb.com_setinvite.aspx-3Finviteid-3D30276-26url-3Dhttp-3A__www.allpcb.com_online-5Fquote.html&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=VRALDmdsziyoxueeKz6mXPEvcc6DHC3hcVq_mlvqGIo&e=>

The other site I would recommend is OSHPark:



https://urldefense.proofpoint.com/v2/url?u=https-3A__oshpark.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=z3OHoUEftZQXgilq__PmOkVk9mUQmTqOuH12jAGHT0c&e=<https://urldefense.proofpoint.com/v2/url?u=https-3A__oshpark.com_&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=dqHZt9-lgSwySoNuMqvHedfU_5GT-Uu8usvQgbFEknc&e=>

They are the ones who do the purple PCBs which look really great and
also pretty cheap, only a few dollars (around $9.50) for three 35mm x
35mm
boards with shipping included.

I am so pleased that the price for creating PCBs yourself is now this
low, up until now I have been carefully making my own by etching them
but
now I can get them in a few days if I need them fast or a couple of
weeks if
I don't mind waiting. There are so many different fabrication sites
there is
always going to be a great deal to be had if you shop around a bit,
the PCB
Shopper site I mentioned above is really great for this.













--
Martin Held - AE7EU
https://urldefense.proofpoint.com/v2/url?u=http-3A__ae7eu.com_&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=-9Z3g0vluuAZ0CwES9hIC_mm66MMSd_8VeEp-4eRYCc&s=GWju2OkfT3ab0H3ltBYwBafVdUS0pvf1njJ1I2zbbiI&e=

-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?



--
Martin Held - AE7EU
https://urldefense.proofpoint.com/v2/url?u=http-3A__ae7eu.com_&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=-9Z3g0vluuAZ0CwES9hIC_mm66MMSd_8VeEp-4eRYCc&s=GWju2OkfT3ab0H3ltBYwBafVdUS0pvf1njJ1I2zbbiI&e=
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?

BITX QSO Afternoon/Night, Sunday, January 28, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

John P
 

BITX QSO Afternoon/Evening, Sunday, January 28, 3PM & 7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere.

While not the greatest band conditions, the afternoon session last week was better than the evening session! So hopefully, we can try both times again this week.

Join us as we make contacts from BITX40 to BITX40 on 7.277 MHz in 40 meters!

This is a worldwide event for BITX40 stations starting at 7pm in each time zone. To participate, call CQ BITX on Sunday, starting at 3PM and/or 7PM your local time. The BITX QSO Night continues through the evening and conditions usually improve after sunset, so it is worthwhile to participate later in the evening.

Suggested Best Operating Practices:

Work at QRP power levels unless conditions require more power.
Call and listen for CQ BITX on the hour and every quarter hour.
It is helpful if you call CQ BITX with your callsign, name and location. 
Repeat your callsign a number of times during your CQ BITX and during QSO's.
Start a QSO by confirming the callsign, location, name and signal report of the other operator.
Say the callsign, name and location of the other operator so others can hear.
If the frequency is busy, avoid long conversations.
After your initial QSO is complete, ask if there are any other stations who would like to contact.

Report your QSO's, discuss propagation, noise, signal reports, audio reports, antenna type, etc. in this thread.

This is an undirected, scheduled event.  The BITX QSO Night relies on you to call CQ BITX to initiate contacts with other stations, so warm up that final and transmit a few calls on Sunday evening.  Talk to you then!
--
John - WA2FZW

Re: BitX40 voltage booster implementation

Vic WA4THR
 

Did some testing today. Running the booster at 14v input and setting the output to 23v I could detect no discernible noise change either on a dummy load or on an antenna. Transmit audio was recorded on a nearby receiver and no added hash or other artifact was noted either. Idle current with no load is perhaps 10ma, so leaving it on all the time the rig is powered is probably no issue. I was reading power into a 450w metered dummy load, so accuracy was not great, but the power level seemed to be up to around 15w (not PEP) on steady AHHH into the mic, as opposed to close to 5 with the standard configuration. Makes sense, (23/14.4)e2 times 6w says I should see 15w in this setup. So this looks like a go, giving nearly an S-unit improvement for little effort.

As an aside, i can tell almost no warming of the PA transistor heat sink during these tests, something I was concerned about. I've been struggling to find a suitable replacement heat sink, keeping with my target of minimizing purchases and using mostly junk-box parts. I do have a potential heat sink that I can use, but it was designed for a different transistor case style so the surface I would use with this TO-220 case is somewhat rough, like a cast finish, and I'm not sure that is a good idea. With the results I've seen is a bigger heat sink really needed? What power level was this one designed for? I only intend to use SSB on this particular rig, too.

=Vic=

Re: Creating Gerber files for pcb construction

Laurence Oberman
 

I got them on Ebay, for about 25 bucks a pop

I am happy to share my design and gerbers if you want them
The design uses a driver op amp so I can drive a 50ohm cable from the
oscillator.
I have it as my reference in my lab and its rock solid.

See picture

On Thu, Jan 25, 2018 at 1:40 PM, Gordon Gibby <ggibby@...> wrote:
that looks really nice! where did you get that ovenoscillator?


________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Laurence Oberman <oberman.l@...>
Sent: Thursday, January 25, 2018 1:26 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction

Here is my 10Mhz oven controlled reference I designed.
This is from pcbway and is one with all though hole.

On Thu, Jan 25, 2018 at 1:16 PM, Diver Martin <diver.martin@...> wrote:
So noted... I'm gonna have to give them a go for the next revision of my
uBitx top modifications... $50 for 10 PCBs vs $105 from DFrobot is a pretty
significant price difference...

On Thu, Jan 25, 2018 at 10:05 AM, Laurence Oberman <oberman.l@...>
wrote:

So far I have used this vendor and I have only Awesome words for them.
My boards are only double sided but have a combination of SMD and through
hole.
I use TIna to create the boards

PCBWAY.COM

On Wed, Jan 24, 2018 at 7:04 PM, Diver Martin <diver.martin@...>
wrote:
Gordon,

I'm very curious about the jclpcb order you made. How is the PCB
quality?
That's a vendor I wanted to try, but haven't gotten around to. They
offer
many of the same features as my current pcb house in china (DFRobot) but
at
about half the cost. Are the boards pictured from jcl or pcbway?

On Wed, Jan 24, 2018 at 3:57 PM, Gordon Gibby <ggibby@...>
wrote:

First set of boards arrived today -- not sure why they shipped me TEN
boards, I only ordered five.
This is all new to me. Soldered in header sockets. Wished I'da
thought
of that for ALL the i/o connections.

Found at least one error so far -- forgot to ground pin 5 of the LCD
display. Have not soldered in the op amp portion but got the LCD
working
(after adding little ground wire) and verified that the Adafruit Si5351
is
bring controlled --- communications receiver hears it right where I
send
its frequency to.

This so SO cool.....

Can't believe how much this forum has taught me in just a few weeks.
This is going to be huge for our local ARES group. Loads of skills
they
can learn.

Gordon

________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Gordon Gibby
<ggibby@...>
Sent: Tuesday, January 23, 2018 4:35 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction

I don't have the exact number, but one company was about $24 (including
shipping) and the other company was $28 (including shipping) --- 5
boards
each company. First time customer.

________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of B C
<k9wis@...>
Sent: Tuesday, January 23, 2018 4:19 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction

what did those boards cost you??
Brian K9WIS

---- Gordon Gibby <ggibby@...> wrote:
Thanks to all your suggestions I made two trial orders:

pcbway.com

jlcpcb.com


About last friday night/saturday.

The first set is supposed to arrive sometime tomorrow (wednesday)

and the other set on Thursday. amazing.


Fingers crossed that I did this correctly!!!


Showed this project to my youngest son (working as a new auto
mechanic)
and he was motivated to get out the christmas arduino kit I gave him
and
immediately started building LED circuits....astonishing my wife and
me....may help him out in life.




________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Gordon Gibby
<ggibby@...>
Sent: Sunday, January 21, 2018 12:09 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction


Thanks for yet another great suggestion.


I have now created a "flying jumpers" breadboard version using a
couple
of different resistive bridge designs --- the K6BEZ design driven by
the
Si5351 directly didn't produce enough voltage to make the reverse
measurement accurate and I gave up after several hours on that.
Would need
to add an amplification stage I believe... The easy swr indicator
kit from

https://urldefense.proofpoint.com/v2/url?u=http-3A__www.qrpkits.com_ezseries.html-23ezswr&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=wATr3kl2cd5RzPMIGfxbDzykiABvusgbH-fnLXPAkSA&e=<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.qrpkits.com_ezseries.html-23ezswr&d=DwMFAw&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=McWMTsaWY88BIHjI9RhDX8BXq0BroHl6MaH6P7zGTVo&s=iOg3ff6bkbrqV9BQbMsupWJHkEUhFqFcHTVOepLM0YM&e=>
(no LED, just take the rectified voltage and run into an op amp with
a gain
of about 6) produced a voltage that seemed to work. My circuit is
sorta
haywire (with egloo jumpers everywhere) and the pcb version would be
FAR
MORE STABLE but I'm able to measure shorts, 25 ohm, 50 ohm, 100 ohm,
220
ohm and open circuit and get "sorta close SWR" measurements at
frequencies
up to maybe 30 MHz. There is so much haywiredness to the breadboard
that I
can't make any better observations at the moment. The PCB should be
a ton
more mechanically stable. Earlier today I put it on a real antenna
and it
did find the resonance.


A friend is working on the "single meter" SWR version using a
toroidial
swr measurement head (which I also have built and should also work).
The
goal there is to emulate the $129 LDG big meter display of SWR.....
The
pcb that I cranked out (and now being built in China, fingers
crossed!)
should work with both. (2 different inputs).


You folks are a lot brighter at this stuff than I am but it has been
a
ton of fun just getting this much to work! I think this is going to
be a
great building project for our ARES group.






________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of William R
Maxwell
<wrmaxwell@...>
Sent: Saturday, January 20, 2018 5:02 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction


Another to consider is

www.jlcpcb.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.jlcpcb.com&d=DwMF-g&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=IdE0tYxjCfc0L_NPXEC5rll-igwhgt6ppqTzraUYlNc&s=WtrSAHHYrh1yu_YDRixyHaUjQzv0a3Hp9-zY2b8fanM&e=>.
I have just received 10 boards for a mere $2 total, including DHL
shipping.
Note the there is a sixe limit of 100mmx100mm, and two layers, green
solder
resist and 1.6mm material.

This offer I think is limited to your initial order. A subsequent set
of
3 boards, 10 copies each, cost me $29, including shipping.

Bill, VK7MX

On 21/01/2018 12:38 AM, Gordon Gibby wrote:
Wow!!! Thank you for that wonderful tip.

Sent from my iPhone

On Jan 20, 2018, at 06:51, Kerr Smith
<kerrsmithusa@...<mailto:kerrsmithusa@...>> wrote:

Have you looked at PCB Shopper? You just set the size of your PCB and
how any boards you require and it will list all the main PCB
fabrication
sites and how much it will cost:



https://urldefense.proofpoint.com/v2/url?u=https-3A__pcbshopper.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=0xNqpq13ii9aT1Sh5iz_prDuqOsArD7fo-GvxVduS2A&e=<https://urldefense.proofpoint.com/v2/url?u=https-3A__pcbshopper.com&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=x1CZZZOSFNIXEjRrVRTlehkNhcaChUif1k7nsMKwx4Q&e=>

For my latest PCBs I tried AllPCB and was extremely pleased with the
results, they had an offer on at the time so for $5 I got 7 boards on
one
order and for my second $5 order I got 17 boards (if your boards are
small
they seem to add in extra to your order) - they were all shipped
using TNT
and arrived in just 5 days. At the current time the total cost is $12
for 5
boards up to 35mm x 35mm with free TNT shipping:



https://urldefense.proofpoint.com/v2/url?u=http-3A__www.allpcb.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=XnTdlYHqFlKmjNeCLrFl6eNp9UdCG5Xzx2kDDYXCyOg&e=<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.allpcb.com_setinvite.aspx-3Finviteid-3D30276-26url-3Dhttp-3A__www.allpcb.com_online-5Fquote.html&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=VRALDmdsziyoxueeKz6mXPEvcc6DHC3hcVq_mlvqGIo&e=>

The other site I would recommend is OSHPark:



https://urldefense.proofpoint.com/v2/url?u=https-3A__oshpark.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=z3OHoUEftZQXgilq__PmOkVk9mUQmTqOuH12jAGHT0c&e=<https://urldefense.proofpoint.com/v2/url?u=https-3A__oshpark.com_&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=dqHZt9-lgSwySoNuMqvHedfU_5GT-Uu8usvQgbFEknc&e=>

They are the ones who do the purple PCBs which look really great and
also pretty cheap, only a few dollars (around $9.50) for three 35mm x
35mm
boards with shipping included.

I am so pleased that the price for creating PCBs yourself is now this
low, up until now I have been carefully making my own by etching them
but
now I can get them in a few days if I need them fast or a couple of
weeks if
I don't mind waiting. There are so many different fabrication sites
there is
always going to be a great deal to be had if you shop around a bit,
the PCB
Shopper site I mentioned above is really great for this.













--
Martin Held - AE7EU
https://urldefense.proofpoint.com/v2/url?u=http-3A__ae7eu.com_&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=-9Z3g0vluuAZ0CwES9hIC_mm66MMSd_8VeEp-4eRYCc&s=GWju2OkfT3ab0H3ltBYwBafVdUS0pvf1njJ1I2zbbiI&e=

-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?



--
Martin Held - AE7EU
https://urldefense.proofpoint.com/v2/url?u=http-3A__ae7eu.com_&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=-9Z3g0vluuAZ0CwES9hIC_mm66MMSd_8VeEp-4eRYCc&s=GWju2OkfT3ab0H3ltBYwBafVdUS0pvf1njJ1I2zbbiI&e=
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?




Antenna connector continuity Ubitx

César EA3IAV
 

Hello! Is it normal to have continuity between the two antenna pins? I mean the p2 connector 

i have desoldered the coqx just in case. Still continuity...

Re: BitX40 voltage booster implementation

Gordon Gibby
 

So, some estimations:


Junction to case, IRF510 is 3.5 deg C per watt

Case to greased surface is 0.5 deg C per watt typical

Those heat sinks look similar to  WV-T220-101E  so roughly 13 deg C per watt.


Total thermal resistance to ambient air:   17 deg C per watt.


Assume ambient of 25 (it might be hotter where you are!!!)

Junction spec'd to 175;  for safety figure 140 at the most...


Means maximum dissipation would be around   (140-25) deg C   /  17 deg C per watt or   6.8 watts per device.   


There have been some efficiency figures around here and they were not outstanding....so maybe figure 50% efficiency.   There are two MOSFETS on the ubitx, so you can dissipate a total of about 13.6 W (max) and with 50% effiiciency that would allow the same level of average output.


So....if you're considering uncompressed SSB with a duty cycle of maybe 30-40%, suggests you'd be OK to a peak power output of 1/0.4  x 13.6 =   34 watts  (that is NOT screaming in the mike nor using a compressor, of course)


Different digital modes use different amounts of power.   When my winlink "shifts gears" you can see the average power drop considerably --- like to 50-30% of peak -- but I've read that PSK31 is an 80% duty cycle --- so for PSK31 you'd be restricted back to 17 watts PEP.  


those are all based on available numbers, your mileage may vary!!!


http://www.arrl.org/news/10-tips-for-the-psk31-digital-mode

http://tymkrs.tumblr.com/post/11910142433/ham-radio-averaging-duty-cycle

http://www.ohmite.com/assets/docs/sink_w.pdf?r=false

https://www.digikey.com/product-detail/en/ohmite/WA-T220-101E/WA-T220-101E-ND/2202817

https://www.vishay.com/docs/91015/sihf510.pdf


And I don't know how to estimate the impact of "hot spots" on the MOSFET die.....



Gordon





From: BITX20@groups.io <BITX20@groups.io> on behalf of Vic WA4THR via Groups.Io <vhklein@...>
Sent: Thursday, January 25, 2018 2:34 PM
To: BITX20@groups.io
Subject: Re: [BITX20] BitX40 voltage booster implementation
 
Did some testing today. Running the booster at 14v input and setting the output to 23v I could detect no discernible noise change either on a dummy load or on an antenna. Transmit audio was recorded on a nearby receiver and no added hash or other artifact was noted either. Idle current with no load is perhaps 10ma, so leaving it on all the time the rig is powered is probably no issue. I was reading power into a 450w metered dummy load, so accuracy was not great, but the power level seemed to be up to around 15w (not PEP) on steady AHHH into the mic, as opposed to close to 5 with the standard configuration. Makes sense, (23/14.4)e2 times 6w says I should see 15w in this setup. So this looks like a go, giving nearly an S-unit improvement for little effort.

As an aside, i can tell almost no warming of the PA transistor heat sink during these tests, something I was concerned about. I've been struggling to find a suitable replacement heat sink, keeping with my target of minimizing purchases and using mostly junk-box parts. I do have a potential heat sink that I can use, but it was designed for a different transistor case style so the surface I would use with this TO-220 case is somewhat rough, like a cast finish, and I'm not sure that is a good idea. With the results I've seen is a bigger heat sink really needed? What power level was this one designed for? I only intend to use SSB on this particular rig, too.

=Vic=

Re: BitX40 voltage booster implementation

Gordon Gibby
 

and if the die to heat sink is truly 4 deg C per watt....then the hot point on the heat sink at max dissipation would be at about 110 deg C.    ​that's pretty hot!!!


Probably you want to keep the heat sink below 80 deg C.    (176 deg F)


Maybe attach a thermisor right to the to-220 tab or glue a disassembled cheap thermometer bulb there and mark your "limit" if you plan to push the limits!!


Gordon




From: BITX20@groups.io <BITX20@groups.io> on behalf of Gordon Gibby <ggibby@...>
Sent: Thursday, January 25, 2018 2:59 PM
To: BITX20@groups.io
Subject: Re: [BITX20] BitX40 voltage booster implementation
 

So, some estimations:


Junction to case, IRF510 is 3.5 deg C per watt

Case to greased surface is 0.5 deg C per watt typical

Those heat sinks look similar to  WV-T220-101E  so roughly 13 deg C per watt.


Total thermal resistance to ambient air:   17 deg C per watt.


Assume ambient of 25 (it might be hotter where you are!!!)

Junction spec'd to 175;  for safety figure 140 at the most...


Means maximum dissipation would be around   (140-25) deg C   /  17 deg C per watt or   6.8 watts per device.   


There have been some efficiency figures around here and they were not outstanding....so maybe figure 50% efficiency.   There are two MOSFETS on the ubitx, so you can dissipate a total of about 13.6 W (max) and with 50% effiiciency that would allow the same level of average output.


So....if you're considering uncompressed SSB with a duty cycle of maybe 30-40%, suggests you'd be OK to a peak power output of 1/0.4  x 13.6 =   34 watts  (that is NOT screaming in the mike nor using a compressor, of course)


Different digital modes use different amounts of power.   When my winlink "shifts gears" you can see the average power drop considerably --- like to 50-30% of peak -- but I've read that PSK31 is an 80% duty cycle --- so for PSK31 you'd be restricted back to 17 watts PEP.  


those are all based on available numbers, your mileage may vary!!!


http://www.arrl.org/news/10-tips-for-the-psk31-digital-mode

http://tymkrs.tumblr.com/post/11910142433/ham-radio-averaging-duty-cycle

http://www.ohmite.com/assets/docs/sink_w.pdf?r=false

https://www.digikey.com/product-detail/en/ohmite/WA-T220-101E/WA-T220-101E-ND/2202817

https://www.vishay.com/docs/91015/sihf510.pdf


And I don't know how to estimate the impact of "hot spots" on the MOSFET die.....



Gordon





From: BITX20@groups.io <BITX20@groups.io> on behalf of Vic WA4THR via Groups.Io <vhklein@...>
Sent: Thursday, January 25, 2018 2:34 PM
To: BITX20@groups.io
Subject: Re: [BITX20] BitX40 voltage booster implementation
 
Did some testing today. Running the booster at 14v input and setting the output to 23v I could detect no discernible noise change either on a dummy load or on an antenna. Transmit audio was recorded on a nearby receiver and no added hash or other artifact was noted either. Idle current with no load is perhaps 10ma, so leaving it on all the time the rig is powered is probably no issue. I was reading power into a 450w metered dummy load, so accuracy was not great, but the power level seemed to be up to around 15w (not PEP) on steady AHHH into the mic, as opposed to close to 5 with the standard configuration. Makes sense, (23/14.4)e2 times 6w says I should see 15w in this setup. So this looks like a go, giving nearly an S-unit improvement for little effort.

As an aside, i can tell almost no warming of the PA transistor heat sink during these tests, something I was concerned about. I've been struggling to find a suitable replacement heat sink, keeping with my target of minimizing purchases and using mostly junk-box parts. I do have a potential heat sink that I can use, but it was designed for a different transistor case style so the surface I would use with this TO-220 case is somewhat rough, like a cast finish, and I'm not sure that is a good idea. With the results I've seen is a bigger heat sink really needed? What power level was this one designed for? I only intend to use SSB on this particular rig, too.

=Vic=

Re: Creating Gerber files for pcb construction

Gordon Gibby
 

Id sure take the schematic!!!!
like to know what op amp does that kinda thing
thanks!
gordon

________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Laurence Oberman <oberman.l@...>
Sent: Thursday, January 25, 2018 2:51 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction

I got them on Ebay, for about 25 bucks a pop

I am happy to share my design and gerbers if you want them
The design uses a driver op amp so I can drive a 50ohm cable from the
oscillator.
I have it as my reference in my lab and its rock solid.

See picture

On Thu, Jan 25, 2018 at 1:40 PM, Gordon Gibby <ggibby@...> wrote:
that looks really nice! where did you get that ovenoscillator?


________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Laurence Oberman <oberman.l@...>
Sent: Thursday, January 25, 2018 1:26 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction

Here is my 10Mhz oven controlled reference I designed.
This is from pcbway and is one with all though hole.

On Thu, Jan 25, 2018 at 1:16 PM, Diver Martin <diver.martin@...> wrote:
So noted... I'm gonna have to give them a go for the next revision of my
uBitx top modifications... $50 for 10 PCBs vs $105 from DFrobot is a pretty
significant price difference...

On Thu, Jan 25, 2018 at 10:05 AM, Laurence Oberman <oberman.l@...>
wrote:

So far I have used this vendor and I have only Awesome words for them.
My boards are only double sided but have a combination of SMD and through
hole.
I use TIna to create the boards

PCBWAY.COM

On Wed, Jan 24, 2018 at 7:04 PM, Diver Martin <diver.martin@...>
wrote:
Gordon,

I'm very curious about the jclpcb order you made. How is the PCB
quality?
That's a vendor I wanted to try, but haven't gotten around to. They
offer
many of the same features as my current pcb house in china (DFRobot) but
at
about half the cost. Are the boards pictured from jcl or pcbway?

On Wed, Jan 24, 2018 at 3:57 PM, Gordon Gibby <ggibby@...>
wrote:

First set of boards arrived today -- not sure why they shipped me TEN
boards, I only ordered five.
This is all new to me. Soldered in header sockets. Wished I'da
thought
of that for ALL the i/o connections.

Found at least one error so far -- forgot to ground pin 5 of the LCD
display. Have not soldered in the op amp portion but got the LCD
working
(after adding little ground wire) and verified that the Adafruit Si5351
is
bring controlled --- communications receiver hears it right where I
send
its frequency to.

This so SO cool.....

Can't believe how much this forum has taught me in just a few weeks.
This is going to be huge for our local ARES group. Loads of skills
they
can learn.

Gordon

________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Gordon Gibby
<ggibby@...>
Sent: Tuesday, January 23, 2018 4:35 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction

I don't have the exact number, but one company was about $24 (including
shipping) and the other company was $28 (including shipping) --- 5
boards
each company. First time customer.

________________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of B C
<k9wis@...>
Sent: Tuesday, January 23, 2018 4:19 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction

what did those boards cost you??
Brian K9WIS

---- Gordon Gibby <ggibby@...> wrote:
Thanks to all your suggestions I made two trial orders:

pcbway.com

jlcpcb.com


About last friday night/saturday.

The first set is supposed to arrive sometime tomorrow (wednesday)

and the other set on Thursday. amazing.


Fingers crossed that I did this correctly!!!


Showed this project to my youngest son (working as a new auto
mechanic)
and he was motivated to get out the christmas arduino kit I gave him
and
immediately started building LED circuits....astonishing my wife and
me....may help him out in life.




________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of Gordon Gibby
<ggibby@...>
Sent: Sunday, January 21, 2018 12:09 AM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction


Thanks for yet another great suggestion.


I have now created a "flying jumpers" breadboard version using a
couple
of different resistive bridge designs --- the K6BEZ design driven by
the
Si5351 directly didn't produce enough voltage to make the reverse
measurement accurate and I gave up after several hours on that.
Would need
to add an amplification stage I believe... The easy swr indicator
kit from

https://urldefense.proofpoint.com/v2/url?u=http-3A__www.qrpkits.com_ezseries.html-23ezswr&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=wATr3kl2cd5RzPMIGfxbDzykiABvusgbH-fnLXPAkSA&e=<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.qrpkits.com_ezseries.html-23ezswr&d=DwMFAw&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=McWMTsaWY88BIHjI9RhDX8BXq0BroHl6MaH6P7zGTVo&s=iOg3ff6bkbrqV9BQbMsupWJHkEUhFqFcHTVOepLM0YM&e=>
(no LED, just take the rectified voltage and run into an op amp with
a gain
of about 6) produced a voltage that seemed to work. My circuit is
sorta
haywire (with egloo jumpers everywhere) and the pcb version would be
FAR
MORE STABLE but I'm able to measure shorts, 25 ohm, 50 ohm, 100 ohm,
220
ohm and open circuit and get "sorta close SWR" measurements at
frequencies
up to maybe 30 MHz. There is so much haywiredness to the breadboard
that I
can't make any better observations at the moment. The PCB should be
a ton
more mechanically stable. Earlier today I put it on a real antenna
and it
did find the resonance.


A friend is working on the "single meter" SWR version using a
toroidial
swr measurement head (which I also have built and should also work).
The
goal there is to emulate the $129 LDG big meter display of SWR.....
The
pcb that I cranked out (and now being built in China, fingers
crossed!)
should work with both. (2 different inputs).


You folks are a lot brighter at this stuff than I am but it has been
a
ton of fun just getting this much to work! I think this is going to
be a
great building project for our ARES group.






________________________________
From: BITX20@groups.io <BITX20@groups.io> on behalf of William R
Maxwell
<wrmaxwell@...>
Sent: Saturday, January 20, 2018 5:02 PM
To: BITX20@groups.io
Subject: Re: [BITX20] Creating Gerber files for pcb construction


Another to consider is

www.jlcpcb.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.jlcpcb.com&d=DwMF-g&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=IdE0tYxjCfc0L_NPXEC5rll-igwhgt6ppqTzraUYlNc&s=WtrSAHHYrh1yu_YDRixyHaUjQzv0a3Hp9-zY2b8fanM&e=>.
I have just received 10 boards for a mere $2 total, including DHL
shipping.
Note the there is a sixe limit of 100mmx100mm, and two layers, green
solder
resist and 1.6mm material.

This offer I think is limited to your initial order. A subsequent set
of
3 boards, 10 copies each, cost me $29, including shipping.

Bill, VK7MX

On 21/01/2018 12:38 AM, Gordon Gibby wrote:
Wow!!! Thank you for that wonderful tip.

Sent from my iPhone

On Jan 20, 2018, at 06:51, Kerr Smith
<kerrsmithusa@...<mailto:kerrsmithusa@...>> wrote:

Have you looked at PCB Shopper? You just set the size of your PCB and
how any boards you require and it will list all the main PCB
fabrication
sites and how much it will cost:



https://urldefense.proofpoint.com/v2/url?u=https-3A__pcbshopper.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=0xNqpq13ii9aT1Sh5iz_prDuqOsArD7fo-GvxVduS2A&e=<https://urldefense.proofpoint.com/v2/url?u=https-3A__pcbshopper.com&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=x1CZZZOSFNIXEjRrVRTlehkNhcaChUif1k7nsMKwx4Q&e=>

For my latest PCBs I tried AllPCB and was extremely pleased with the
results, they had an offer on at the time so for $5 I got 7 boards on
one
order and for my second $5 order I got 17 boards (if your boards are
small
they seem to add in extra to your order) - they were all shipped
using TNT
and arrived in just 5 days. At the current time the total cost is $12
for 5
boards up to 35mm x 35mm with free TNT shipping:



https://urldefense.proofpoint.com/v2/url?u=http-3A__www.allpcb.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=XnTdlYHqFlKmjNeCLrFl6eNp9UdCG5Xzx2kDDYXCyOg&e=<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.allpcb.com_setinvite.aspx-3Finviteid-3D30276-26url-3Dhttp-3A__www.allpcb.com_online-5Fquote.html&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=VRALDmdsziyoxueeKz6mXPEvcc6DHC3hcVq_mlvqGIo&e=>

The other site I would recommend is OSHPark:



https://urldefense.proofpoint.com/v2/url?u=https-3A__oshpark.com&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=E2shNumHkU2z89FEz9fB1rmv1B9-9CwkXYgBQ56sX18&s=z3OHoUEftZQXgilq__PmOkVk9mUQmTqOuH12jAGHT0c&e=<https://urldefense.proofpoint.com/v2/url?u=https-3A__oshpark.com_&d=DwMFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=tVwyxBAPRZNQpdExa-g1tsq8okRaE7YCQUjWUUW6hMg&s=dqHZt9-lgSwySoNuMqvHedfU_5GT-Uu8usvQgbFEknc&e=>

They are the ones who do the purple PCBs which look really great and
also pretty cheap, only a few dollars (around $9.50) for three 35mm x
35mm
boards with shipping included.

I am so pleased that the price for creating PCBs yourself is now this
low, up until now I have been carefully making my own by etching them
but
now I can get them in a few days if I need them fast or a couple of
weeks if
I don't mind waiting. There are so many different fabrication sites
there is
always going to be a great deal to be had if you shop around a bit,
the PCB
Shopper site I mentioned above is really great for this.













--
Martin Held - AE7EU
https://urldefense.proofpoint.com/v2/url?u=http-3A__ae7eu.com_&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=-9Z3g0vluuAZ0CwES9hIC_mm66MMSd_8VeEp-4eRYCc&s=GWju2OkfT3ab0H3ltBYwBafVdUS0pvf1njJ1I2zbbiI&e=

-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?



--
Martin Held - AE7EU
https://urldefense.proofpoint.com/v2/url?u=http-3A__ae7eu.com_&d=DwIFaQ&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=3ELgZgmTnPzGsfvQxkd1S_2NGLYM8sHTxVCQKFxhVXQ&m=-9Z3g0vluuAZ0CwES9hIC_mm66MMSd_8VeEp-4eRYCc&s=GWju2OkfT3ab0H3ltBYwBafVdUS0pvf1njJ1I2zbbiI&e=
-------------------------------------------------------------------------------
If there aren't any questions, then what is there to learn?




Re: Antenna connector continuity Ubitx

Arvo W0VRA
 

I can follow a trace from P2 to ground through an inductor, so at DC, like your DMM would be using to check that, I'd say yes.

And if someone who knows what they're talking about will agree, I'll give myself a high five.

Re: BitX40 voltage booster implementation

Arvo W0VRA
 

On the power side, I'm thinking about a 19V laptop supply and building a small card with 19, 12, and 5V busses.   19V to the PA section, 12 V for the rig in general, and 5 to the SSM2167 card, and maybe to the Raduino.

Analog keyer revisited #ubitx

John Pieper
 

I incorporated the keyer code from W0EB and W2CTX into my personal software build, but being determined to save the last analog input for S/power metering, kept the single input that detects three levels (four originally, but I don't care much about straight keying so I left that out for now). Some of the errors I've experienced and others have reported with the single line seemed to me consistent with the ADC deciding the state was "both" instead of "dit", for example an 'I' becoming an 'N' while the dit paddle is held closed. Looking at the nominal voltage levels with the provided resistors, I saw that there was only around 0.22 volts between the "dit" and "both" levels (1.60 vs 1.38 V). On the other hand, there is 1.8 volts between "dit" and "dah". Errors due to fluctuations would be much more likely between "dit" and "both".

Hoping to improve the situation, I did a little numerical study of the divider circuit. It turned out that there is really no area in the 2D "space" of possible resistor values that gives an ideal result (large equal intervals between both pairs of levels), but it is possible at least to increase the dit-both spacing significantly, at the expense of the dit-dah spacing. In the end I replaced the 2.2k resistor with a 5.1k one. Now the nominal levels are 3.4 V for "dah", 2.6 V for "dit", and 2.1 V for "both". I made an educated estimate of what the boundary ADC values should be and put them into my customized paddle-latch function.

The results so far are favorable. I have sent a fair amount of practice code (I also added a "practice" mode that only plays the sidetone) at speeds up to 25 wpm, and have detected no errors that were not caused by my fist. The iambic action seems flawless and smooth. I might actually get good at sending iambic style someday...

73, John AD0RW

Re: Antenna connector continuity Ubitx

Jerry Gaffke
 

Looking at the uBitx schematic, it shows the relays in the receive state.
On receive, there's a DC path to ground going through K3, K1, L1,2,3,4 and T3
On transmit, with the band select relays as shown for 30m, there's a path through KT1, L13,12,11 and T11.
Hi five!


On Thu, Jan 25, 2018 at 12:33 pm, Arvo KD9HLC wrote:
I can follow a trace from P2 to ground through an inductor, so at DC, like your DMM would be using to check that, I'd say yes.

Re: Antenna connector continuity Ubitx

Arvo W0VRA
 

Woot!