Date   
Re: Can uBITX be modified for AM Phone operation?

Nelson
 

Howdy Jerry,

I am looking forward to getting the uBITX and getting it together so I can learn about this stuff.  Most of my equipment glows in the dark so this arduino stuff is all new to me and I am looking forward to playing around with it.  I am planning to get another uBITX or a BITX40 etc just to play around with the programming and hardware. Perhaps I'll play around with trying to get AM operation out of one of the single band units.  I'll be sure and post if it can be done (or even if I just can't figure out how to do it...)

Thnaks,

Nelson
KG7GYS

On Wed, Jan 24, 2018 at 8:03 PM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:
AM Phone would require a significant redesign. 
Start by ripping out the 12mhz crystal filter at X1-8
and the balanced modulator at T7/D5
Have at it!

Jerry, KE7ER


On Wed, Jan 24, 2018 at 07:56 pm, Nelson wrote:
Can the transceiver be modified for AM Phone operation?  If so what would be involved?




--
I always thought the Universe was a wonderfully strange place until I studied Particle Physics - I now know the Universe is, in fact, profoundly odd in nature

Re: Power Supply Option

AA9GG
 

I HIGHLY suggest one of these:  http://www.12voltpowersupplies.us/
I put one into a box with volt and amp meters. I also added a dual USB port to it for charging stuff.  The ONLY noise I get from it is actually from the switching regulator in USB module I used and that only happens when the port is in use.

73 de AA9GG

On Sun, Jan 21, 2018 at 2:13 PM, David Lacey via Groups.Io <g4jbe@...> wrote:
Dirty DC made for striplights (led`s) noisy as hell I would guess !
Dave

On 21/01/2018 18:10, Rob Snow wrote:
I'm looking at this 12v 30a/360w power supply that was suggested by someone recently.  It has adustable output and runs a whopping $21.49 delivered from Amazon.  If it doesn't suck, it'll be handy to have around.





--
Paul Mateer, AA9GG
Elan Engineering Corp.
www.elanengr.com
NAQCC 3123, SKCC 4628

Re: Creating Gerber files for pcb construction

William R Maxwell
 

If you play around with the quantity on the on-line quotation screen on the website of just about any othe Chinese manufacturers, you will see that 10 boards usually cost exactly the same total as any lesser quantity, provided the size is within the specified maximum for their current special offer, usually a maximum of 100mm x 100mm. Hence my hint of a week or so back to order 10.

Bill VK7MX

On 25/01/2018 10:57 AM, Gordon Gibby 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.














Re: BitX40 voltage booster implementation

AA9GG
 

That's the same one I use Mike.....

--
Paul Mateer, AA9GG
Elan Engineering Corp.
www.elanengr.com
NAQCC 3123, SKCC 4628

Re: SMD Group Build

William R Maxwell
 

0805 is a happy medium.

Bill, VK7MX


On 25/01/2018 3:20 PM, Jack Purdum via Groups.Io wrote:
I can barely see a 0603! I would prefer 1206 if I can find them and am not too worried about the cost differential.
Jack, W8TEE


From: Clark Martin <kk6isp@...>
To: BITX20@groups.io
Sent: Wednesday, January 24, 2018 9:15 PM
Subject: Re: [BITX20] SMD Group Build


Clark Martin
KK6ISP

On Jan 24, 2018, at 5:56 PM, Diver Martin <diver.martin@...> wrote:

Mouser & Digikey are my go-to for SMT parts.  They carry just about everything.  If you have other oddball SMT stuff, and either one are out, head to findchips.com.  There are alternate suppliers, but those two always have what I need, either in the exact specified part number, or an equivalent.  Other places will source 1206's and stuff, but might only sell by the full reel (which I have yet to need, except maybe 0.01uF caps or 0.1uF caps across multiple, multiple projects).

SMD resistors/caps (0603, 5% in my case) are usually cheap enough that I buy them in 1000-piece quantity, because $2 of parts for life or $0.5 for the parts I need for the project, and to always have them on hand, is easy.


I’ve only bought from Digikey a few times but I use Mouser all the time.  Also there are Newark and Allied for such supplies.

I bought a set of 0805 resistors (from 0 ohm through several Mohms) and a set of 0805 caps (10s of pF through 1µF).  They came on cards that fit a day planner binder.  There are between 1 and four strips of 25 each for each value (depending on expected usage levels).  I have little trouble working with 0805 parts and they  fit nicely on .1” grid perfboard (with plated through holes).  

When I use up a strip I buy a new strip of 25 at a local electronics shop (Silicon Valley still has a few).

I haven’t done any PCB fabricating yet but that is in the plans.

SMD diodes and transistors of most any size are easily soldered to perfboard.

I’ve also soldered up to 8 pin SOICss buy putting alternate pins on the perfboard pads and tack soldering leads to the other pins.

It definitely makes for smaller boards.



Re: SMD Group Build

Ashhar Farhan
 

I use double side, plain copper clad. Then, with a sharp knife (i use a glass cutter), i score off an island of 3x2 to 5x2 squares of about 0.25inch to a side. I use all around for the ground plane, and solder the 1206 betweeb the pads. The sot23 transistors are soldered at a corner of three squares. If the ground planing ia crucial, i drill a number of holes around the top ground plane and solder small pieces of wire to connect to the Bottom ground

On 25 Jan 2018 10:24 am, "William R Maxwell" <wrmaxwell@...> wrote:

0805 is a happy medium.

Bill, VK7MX


On 25/01/2018 3:20 PM, Jack Purdum via Groups.Io wrote:
I can barely see a 0603! I would prefer 1206 if I can find them and am not too worried about the cost differential.
Jack, W8TEE


From: Clark Martin <kk6isp@...>
To: BITX20@groups.io
Sent: Wednesday, January 24, 2018 9:15 PM
Subject: Re: [BITX20] SMD Group Build


Clark Martin
KK6ISP

On Jan 24, 2018, at 5:56 PM, Diver Martin <diver.martin@...> wrote:

Mouser & Digikey are my go-to for SMT parts.  They carry just about everything.  If you have other oddball SMT stuff, and either one are out, head to findchips.com.  There are alternate suppliers, but those two always have what I need, either in the exact specified part number, or an equivalent.  Other places will source 1206's and stuff, but might only sell by the full reel (which I have yet to need, except maybe 0.01uF caps or 0.1uF caps across multiple, multiple projects).

SMD resistors/caps (0603, 5% in my case) are usually cheap enough that I buy them in 1000-piece quantity, because $2 of parts for life or $0.5 for the parts I need for the project, and to always have them on hand, is easy.


I’ve only bought from Digikey a few times but I use Mouser all the time.  Also there are Newark and Allied for such supplies.

I bought a set of 0805 resistors (from 0 ohm through several Mohms) and a set of 0805 caps (10s of pF through 1µF).  They came on cards that fit a day planner binder.  There are between 1 and four strips of 25 each for each value (depending on expected usage levels).  I have little trouble working with 0805 parts and they  fit nicely on .1” grid perfboard (with plated through holes).  

When I use up a strip I buy a new strip of 25 at a local electronics shop (Silicon Valley still has a few).

I haven’t done any PCB fabricating yet but that is in the plans.

SMD diodes and transistors of most any size are easily soldered to perfboard.

I’ve also soldered up to 8 pin SOICss buy putting alternate pins on the perfboard pads and tack soldering leads to the other pins.

It definitely makes for smaller boards.




Re: SMD Group Build

Jack, W8TEE
 

It looks more like a happy grain of salt to me! I have very little experience myself with SMD's, but they don't scare me anymore. Perhaps a partial reason is because I can't see most of them...

Jack, W8TEE


From: William R Maxwell <wrmaxwell@...>
To: BITX20@groups.io
Sent: Wednesday, January 24, 2018 11:54 PM
Subject: Re: [BITX20] SMD Group Build

0805 is a happy medium.
Bill, VK7MX

On 25/01/2018 3:20 PM, Jack Purdum via Groups.Io wrote:
I can barely see a 0603! I would prefer 1206 if I can find them and am not too worried about the cost differential.
Jack, W8TEE


From: Clark Martin <kk6isp@...>
To: BITX20@groups.io
Sent: Wednesday, January 24, 2018 9:15 PM
Subject: Re: [BITX20] SMD Group Build


Clark Martin
KK6ISP

On Jan 24, 2018, at 5:56 PM, Diver Martin <diver.martin@...> wrote:

Mouser & Digikey are my go-to for SMT parts.  They carry just about everything.  If you have other oddball SMT stuff, and either one are out, head to findchips.com.  There are alternate suppliers, but those two always have what I need, either in the exact specified part number, or an equivalent.  Other places will source 1206's and stuff, but might only sell by the full reel (which I have yet to need, except maybe 0.01uF caps or 0.1uF caps across multiple, multiple projects).

SMD resistors/caps (0603, 5% in my case) are usually cheap enough that I buy them in 1000-piece quantity, because $2 of parts for life or $0.5 for the parts I need for the project, and to always have them on hand, is easy.


I’ve only bought from Digikey a few times but I use Mouser all the time.  Also there are Newark and Allied for such supplies.

I bought a set of 0805 resistors (from 0 ohm through several Mohms) and a set of 0805 caps (10s of pF through 1µF).  They came on cards that fit a day planner binder.  There are between 1 and four strips of 25 each for each value (depending on expected usage levels).  I have little trouble working with 0805 parts and they  fit nicely on .1” grid perfboard (with plated through holes).  

When I use up a strip I buy a new strip of 25 at a local electronics shop (Silicon Valley still has a few).

I haven’t done any PCB fabricating yet but that is in the plans.

SMD diodes and transistors of most any size are easily soldered to perfboard.

I’ve also soldered up to 8 pin SOICss buy putting alternate pins on the perfboard pads and tack soldering leads to the other pins.

It definitely makes for smaller boards.





Re: SMD Group Build

Diver Martin <diver.martin@...>
 

Jack,

Just as a point of reference:  Going for 5% tolerance 1k ohm resistors, and buying 1000 at a time, a quick search on digikey gives me:

1000x 0603 resistors:  $2.07
1000x 0805 resistors:  $3.03
1000x 1206 resistors:  $4.63

For reference
1000x axial TH resistors: $7.29.

At a half penny a pop, the cost of 1206 vs 0603 I'm betting isn't going to be a noticable difference.  (At 100qty, they're about 2x as much, ~$0.01 each, or $1 for 100).  You can really sneeze hard and not loose a lot of money.



On Wed, Jan 24, 2018 at 8:20 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
I can barely see a 0603! I would prefer 1206 if I can find them and am not too worried about the cost differential.
Jack, W8TEE


From: Clark Martin <kk6isp@...>
To: BITX20@groups.io
Sent: Wednesday, January 24, 2018 9:15 PM
Subject: Re: [BITX20] SMD Group Build


Clark Martin
KK6ISP

On Jan 24, 2018, at 5:56 PM, Diver Martin <diver.martin@...> wrote:

Mouser & Digikey are my go-to for SMT parts.  They carry just about everything.  If you have other oddball SMT stuff, and either one are out, head to findchips.com.  There are alternate suppliers, but those two always have what I need, either in the exact specified part number, or an equivalent.  Other places will source 1206's and stuff, but might only sell by the full reel (which I have yet to need, except maybe 0.01uF caps or 0.1uF caps across multiple, multiple projects).

SMD resistors/caps (0603, 5% in my case) are usually cheap enough that I buy them in 1000-piece quantity, because $2 of parts for life or $0.5 for the parts I need for the project, and to always have them on hand, is easy.


I’ve only bought from Digikey a few times but I use Mouser all the time.  Also there are Newark and Allied for such supplies.

I bought a set of 0805 resistors (from 0 ohm through several Mohms) and a set of 0805 caps (10s of pF through 1µF).  They came on cards that fit a day planner binder.  There are between 1 and four strips of 25 each for each value (depending on expected usage levels).  I have little trouble working with 0805 parts and they  fit nicely on .1” grid perfboard (with plated through holes).  

When I use up a strip I buy a new strip of 25 at a local electronics shop (Silicon Valley still has a few).

I haven’t done any PCB fabricating yet but that is in the plans.

SMD diodes and transistors of most any size are easily soldered to perfboard.

I’ve also soldered up to 8 pin SOICss buy putting alternate pins on the perfboard pads and tack soldering leads to the other pins.

It definitely makes for smaller boards.





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

Re: SMD Group Build

Jack, W8TEE
 

Do you feel that is easier than, say, doing a Muppet board and etching it yourself?
Jack, W8TEE


From: Ashhar Farhan <farhanbox@...>
To: BITX20@groups.io
Sent: Thursday, January 25, 2018 12:04 AM
Subject: Re: [BITX20] SMD Group Build

I use double side, plain copper clad. Then, with a sharp knife (i use a glass cutter), i score off an island of 3x2 to 5x2 squares of about 0.25inch to a side. I use all around for the ground plane, and solder the 1206 betweeb the pads. The sot23 transistors are soldered at a corner of three squares. If the ground planing ia crucial, i drill a number of holes around the top ground plane and solder small pieces of wire to connect to the Bottom ground

On 25 Jan 2018 10:24 am, "William R Maxwell" <wrmaxwell@...> wrote:
0805 is a happy medium.
Bill, VK7MX

On 25/01/2018 3:20 PM, Jack Purdum via Groups.Io wrote:
I can barely see a 0603! I would prefer 1206 if I can find them and am not too worried about the cost differential.
Jack, W8TEE


From: Clark Martin <kk6isp@...>
To: BITX20@groups.io
Sent: Wednesday, January 24, 2018 9:15 PM
Subject: Re: [BITX20] SMD Group Build


Clark Martin
KK6ISP

On Jan 24, 2018, at 5:56 PM, Diver Martin <diver.martin@...> wrote:

Mouser & Digikey are my go-to for SMT parts.  They carry just about everything.  If you have other oddball SMT stuff, and either one are out, head to findchips.com.  There are alternate suppliers, but those two always have what I need, either in the exact specified part number, or an equivalent.  Other places will source 1206's and stuff, but might only sell by the full reel (which I have yet to need, except maybe 0.01uF caps or 0.1uF caps across multiple, multiple projects).

SMD resistors/caps (0603, 5% in my case) are usually cheap enough that I buy them in 1000-piece quantity, because $2 of parts for life or $0.5 for the parts I need for the project, and to always have them on hand, is easy.


I’ve only bought from Digikey a few times but I use Mouser all the time.  Also there are Newark and Allied for such supplies.

I bought a set of 0805 resistors (from 0 ohm through several Mohms) and a set of 0805 caps (10s of pF through 1µF).  They came on cards that fit a day planner binder.  There are between 1 and four strips of 25 each for each value (depending on expected usage levels).  I have little trouble working with 0805 parts and they  fit nicely on .1” grid perfboard (with plated through holes).  

When I use up a strip I buy a new strip of 25 at a local electronics shop (Silicon Valley still has a few).

I haven’t done any PCB fabricating yet but that is in the plans.

SMD diodes and transistors of most any size are easily soldered to perfboard.

I’ve also soldered up to 8 pin SOICss buy putting alternate pins on the perfboard pads and tack soldering leads to the other pins.

It definitely makes for smaller boards.






Re: Oscilloscope for Beginners

Ashhar Farhan
 

The rigol ds1052e is very good for general use. I can see upto 200 mhz on it. Works well, it has a nominal spectrum analyzer too.
- f

On 24 Jan 2018 10:29 pm, "Goran VE6GPO" <goran.poprzen@...> wrote:
Found this long time ago at http://www.audiokarma.org/forums/showthread.php?t=35392
Enjoy!!!
==================================================
Hot Rod Oscilloscope   
by Dennis L. Feucht
 
With apologies to the '60s hit tune, "Hot Rod Lincoln"
 
You've heard the story of the bandwidth race,
Where 'scopes and counters were setting the pace;
Well that story is true, I'm here to say;
I was using a 545A.
 
It's got a graticule, all lit up,
That front-panel claptrap makes it look tough.
It's got plug-ins, uses 'em all;
It's got good risetime, and also fall.
 
With a dual-trace display at reasonable cost,
And forty-eleven knobs, you can really get lost;
It's got a dual-delayed timebase, but I ain't scared,
The trace is sharp; the probes are fair.
 
Pulled out a new project late one night,
The test equipment was burning bright,
I started driving a wideband amp,
To see which stage I needed to damp.
 
When all of a sudden in the blink of an eye,
A series of waveforms passed me by,
And I said, "Wow, that's a marvel to me!"
Pretty soon a square-wave was all I could see.
 
Now the boss was ribbing me for being behind,
So I thought I'd make the probes unwind,
Took the volts per div knob, and man alive!
I turned it up to a setting of 5.
 
Powered the wideband amp again,
And drove it with a function gen,
Set the amplitude knob to three or four,
The levels were hitting the ceiling and floor.
 
Now the transient response made no sense,
The scope display looked like a picket fence.
I slowed it down and was glad to know,
That it wouldn't alias like a DSO.
 
I tweaked the circuit here and there,
Replaced a cap and transistor pair;
Got the speed I needed with room to go;
Manufacturing would be glad to know.
 
Smoke was coming from out of the load
When I set the trigger to hf mode;
The power bandwidth was looking right;
Nearly approaching the speed of light.
 
The task was finished, the specs first-rate,
The customers called, said the amp worked great;
I got a promotion, moved out of L.A.,
And I credit success to that '45A!
 
======================================


Re: #ubitx and 6 meters #ubitx

Tom Christian
 

Thanks, Bill!  I'll be anxious to hear what you find.  I sure will be glad when my ubitx finally shows up so I can join the fun for real....:)
Tom
AB7WT

Re: SMD Group Build

Diver Martin <diver.martin@...>
 

I've found it's never worth it for me to etch my own PCB's.  Ferric chloride, and all those other etchants, blech.  And, a total lack of vias and soldermask, no thanks....

On Wed, Jan 24, 2018 at 9:10 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
Do you feel that is easier than, say, doing a Muppet board and etching it yourself?
Jack, W8TEE


From: Ashhar Farhan <farhanbox@...>
To: BITX20@groups.io
Sent: Thursday, January 25, 2018 12:04 AM

Subject: Re: [BITX20] SMD Group Build

I use double side, plain copper clad. Then, with a sharp knife (i use a glass cutter), i score off an island of 3x2 to 5x2 squares of about 0.25inch to a side. I use all around for the ground plane, and solder the 1206 betweeb the pads. The sot23 transistors are soldered at a corner of three squares. If the ground planing ia crucial, i drill a number of holes around the top ground plane and solder small pieces of wire to connect to the Bottom ground

On 25 Jan 2018 10:24 am, "William R Maxwell" <wrmaxwell@...> wrote:
0805 is a happy medium.
Bill, VK7MX

On 25/01/2018 3:20 PM, Jack Purdum via Groups.Io wrote:
I can barely see a 0603! I would prefer 1206 if I can find them and am not too worried about the cost differential.
Jack, W8TEE


From: Clark Martin <kk6isp@...>
To: BITX20@groups.io
Sent: Wednesday, January 24, 2018 9:15 PM
Subject: Re: [BITX20] SMD Group Build


Clark Martin
KK6ISP

On Jan 24, 2018, at 5:56 PM, Diver Martin <diver.martin@...> wrote:

Mouser & Digikey are my go-to for SMT parts.  They carry just about everything.  If you have other oddball SMT stuff, and either one are out, head to findchips.com.  There are alternate suppliers, but those two always have what I need, either in the exact specified part number, or an equivalent.  Other places will source 1206's and stuff, but might only sell by the full reel (which I have yet to need, except maybe 0.01uF caps or 0.1uF caps across multiple, multiple projects).

SMD resistors/caps (0603, 5% in my case) are usually cheap enough that I buy them in 1000-piece quantity, because $2 of parts for life or $0.5 for the parts I need for the project, and to always have them on hand, is easy.


I’ve only bought from Digikey a few times but I use Mouser all the time.  Also there are Newark and Allied for such supplies.

I bought a set of 0805 resistors (from 0 ohm through several Mohms) and a set of 0805 caps (10s of pF through 1µF).  They came on cards that fit a day planner binder.  There are between 1 and four strips of 25 each for each value (depending on expected usage levels).  I have little trouble working with 0805 parts and they  fit nicely on .1” grid perfboard (with plated through holes).  

When I use up a strip I buy a new strip of 25 at a local electronics shop (Silicon Valley still has a few).

I haven’t done any PCB fabricating yet but that is in the plans.

SMD diodes and transistors of most any size are easily soldered to perfboard.

I’ve also soldered up to 8 pin SOICss buy putting alternate pins on the perfboard pads and tack soldering leads to the other pins.

It definitely makes for smaller boards.









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

Re: Oscilloscope for Beginners - A story

Ashhar Farhan
 

There is a very strong connection of ham radio and tek. Many of our heros are alumni of tek. They invented many things. I found out they invented the tunnel diode, made their own devices, displays.
- f

On 24 Jan 2018 11:10 pm, "Michael Hagen" <motdog@...> wrote:

The Rigol I got had about 17 hrs. on the meter.  It still was running all the options they turn off after 30 Hrs.


Then they want you to pay!

At the time they were $299 new, I bid $260 on eBay.  What a deal, and you get 4 new probes!  No tax and just a little shipping.

There are tons of information out there on the DS1054Z.    Lots of reviews.  Only big complaints are too much on the screen and it is very small.  The encoders have small knobs, and you have to push just right or the encoder might move?  There is a hack out in the wild to change the options yourself, so you get 100 Mhz and special triggering functions, and deep memory.   You do it at your own risk.  You can find info on lots of sites.  I doubt if their newer models have this "feature"?

I just wish it was a little bigger.  I hope it stays working now that I am bragging about it!

I really hated my $65 PC connected scope mentioned to start this thread.  Hantek had NO support and no Firmware

updates.  I had to carry a big 600V 1uf cap to AC couple it.  The triggering options were very minimal.

Like you I really like Real Analog scopes, but their day is gone.

73's

Mike, WA6ISP

https://www.ebay.com/itm/Rigol-DS1054Z-Digital-Oscilloscopes-Bandwidth-50-Mhz-Channels-4/331941742120?epid=2254681137&hash=item4d49450628:g:EHYAAOSwUoNaA4By


On 1/24/2018 9:12 AM, Jerry Gaffke via Groups.Io wrote:
I've always had a soft spot for a good analog scope,
and John's post had me prowling around ebay some.
Anything moderately cheap is "parts only", refurbished you spend about
as much as you would for a new Rigol.

Unless you get a really good deal on one you know works,
I can't recommend an old used scope to the typical hobbyist.
Fixing those old scopes with all their custom parts can be non-trivial.

Jerry, KE7ER 


On Wed, Jan 24, 2018 at 08:24 am, Michael Hagen wrote:

So, I gave up, if it is not a simple fix, they seemed to consume all my time.

 


-- 
Mike Hagen, WA6ISP
10917 Bryant Street
Yucaipa, Ca. 92399
(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...

Re: uBitx TX performance with frequency

Ashhar Farhan
 

You can increase drive with the preset of the predriver.
- f

On 24 Jan 2018 6:24 pm, "KD8CGH" <rkayakr@...> wrote:
I took some time to measure the actual performance of my uBitx with its original calibration against a dummy load. The instruments used are not lab calibrated. I did check my wattmeter against my recently factory calibrated K3 and found the power reported to be about 5% high. The power supply is rated as 25 amps and set at 13.7 volts. I tested by simply pressing the PTT (no audio input, power out 0) and keying CW.
Receive current: .25 A

  PTT CW CW
f kHz I amp I amp P watt
3,530 0.74 1.8 8
3,970 0.74 2.1 9
7,030 0.73 1.57 5
7,270 0.7 1.6 5
10,113 0.72 1.22 3
14,030 0.71 1.34 3
14,320 0.71 1.37 3
21,170 0.69 0.96 1
28,900 0.69 0.83 0.5

The results agreed in general with Dave's (WI6R) post https://groups.io/g/BITX20/message/39578, although his results start a bit higher and end even lower.
Although my current draw with PTT down agrees with the value specified on the Tune-up page, I never quite see 10 watts out. The 80 meter power isn't too bad, but the 14 MHz is half and 28 MHz is 1/4 of that mentioned on the uBitx web page.

What TX performance have others seen?
Any fixes for higher frequencies?

     Bob   KD8CGH

Re: SMD Group Build

Jack, W8TEE
 

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.

Jack, W8TEE



From: Diver Martin <diver.martin@...>
To: BITX20@groups.io
Sent: Thursday, January 25, 2018 12:09 AM
Subject: Re: [BITX20] SMD Group Build

Jack,

Just as a point of reference:  Going for 5% tolerance 1k ohm resistors, and buying 1000 at a time, a quick search on digikey gives me:

1000x 0603 resistors:  $2.07
1000x 0805 resistors:  $3.03
1000x 1206 resistors:  $4.63

For reference
1000x axial TH resistors: $7.29.

At a half penny a pop, the cost of 1206 vs 0603 I'm betting isn't going to be a noticable difference.  (At 100qty, they're about 2x as much, ~$0.01 each, or $1 for 100).  You can really sneeze hard and not loose a lot of money.



On Wed, Jan 24, 2018 at 8:20 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
I can barely see a 0603! I would prefer 1206 if I can find them and am not too worried about the cost differential.
Jack, W8TEE


From: Clark Martin <kk6isp@...>
To: BITX20@groups.io
Sent: Wednesday, January 24, 2018 9:15 PM
Subject: Re: [BITX20] SMD Group Build


Clark Martin
KK6ISP

On Jan 24, 2018, at 5:56 PM, Diver Martin <diver.martin@...> wrote:

Mouser & Digikey are my go-to for SMT parts.  They carry just about everything.  If you have other oddball SMT stuff, and either one are out, head to findchips.com.  There are alternate suppliers, but those two always have what I need, either in the exact specified part number, or an equivalent.  Other places will source 1206's and stuff, but might only sell by the full reel (which I have yet to need, except maybe 0.01uF caps or 0.1uF caps across multiple, multiple projects).

SMD resistors/caps (0603, 5% in my case) are usually cheap enough that I buy them in 1000-piece quantity, because $2 of parts for life or $0.5 for the parts I need for the project, and to always have them on hand, is easy.


I’ve only bought from Digikey a few times but I use Mouser all the time.  Also there are Newark and Allied for such supplies.

I bought a set of 0805 resistors (from 0 ohm through several Mohms) and a set of 0805 caps (10s of pF through 1µF).  They came on cards that fit a day planner binder.  There are between 1 and four strips of 25 each for each value (depending on expected usage levels).  I have little trouble working with 0805 parts and they  fit nicely on .1” grid perfboard (with plated through holes).  

When I use up a strip I buy a new strip of 25 at a local electronics shop (Silicon Valley still has a few).

I haven’t done any PCB fabricating yet but that is in the plans.

SMD diodes and transistors of most any size are easily soldered to perfboard.

I’ve also soldered up to 8 pin SOICss buy putting alternate pins on the perfboard pads and tack soldering leads to the other pins.

It definitely makes for smaller boards.





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


Re: SMD Group Build

Diver Martin <diver.martin@...>
 

On Wed, 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.

Jack, W8TEE



From: Diver Martin <diver.martin@...>
To: BITX20@groups.io
Sent: Thursday, January 25, 2018 12:09 AM

Subject: Re: [BITX20] SMD Group Build

Jack,

Just as a point of reference:  Going for 5% tolerance 1k ohm resistors, and buying 1000 at a time, a quick search on digikey gives me:

1000x 0603 resistors:  $2.07
1000x 0805 resistors:  $3.03
1000x 1206 resistors:  $4.63

For reference
1000x axial TH resistors: $7.29.

At a half penny a pop, the cost of 1206 vs 0603 I'm betting isn't going to be a noticable difference.  (At 100qty, they're about 2x as much, ~$0.01 each, or $1 for 100).  You can really sneeze hard and not loose a lot of money.



On Wed, Jan 24, 2018 at 8:20 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
I can barely see a 0603! I would prefer 1206 if I can find them and am not too worried about the cost differential.
Jack, W8TEE


From: Clark Martin <kk6isp@...>
To: BITX20@groups.io
Sent: Wednesday, January 24, 2018 9:15 PM
Subject: Re: [BITX20] SMD Group Build


Clark Martin
KK6ISP

On Jan 24, 2018, at 5:56 PM, Diver Martin <diver.martin@...> wrote:

Mouser & Digikey are my go-to for SMT parts.  They carry just about everything.  If you have other oddball SMT stuff, and either one are out, head to findchips.com.  There are alternate suppliers, but those two always have what I need, either in the exact specified part number, or an equivalent.  Other places will source 1206's and stuff, but might only sell by the full reel (which I have yet to need, except maybe 0.01uF caps or 0.1uF caps across multiple, multiple projects).

SMD resistors/caps (0603, 5% in my case) are usually cheap enough that I buy them in 1000-piece quantity, because $2 of parts for life or $0.5 for the parts I need for the project, and to always have them on hand, is easy.


I’ve only bought from Digikey a few times but I use Mouser all the time.  Also there are Newark and Allied for such supplies.

I bought a set of 0805 resistors (from 0 ohm through several Mohms) and a set of 0805 caps (10s of pF through 1µF).  They came on cards that fit a day planner binder.  There are between 1 and four strips of 25 each for each value (depending on expected usage levels).  I have little trouble working with 0805 parts and they  fit nicely on .1” grid perfboard (with plated through holes).  

When I use up a strip I buy a new strip of 25 at a local electronics shop (Silicon Valley still has a few).

I haven’t done any PCB fabricating yet but that is in the plans.

SMD diodes and transistors of most any size are easily soldered to perfboard.

I’ve also soldered up to 8 pin SOICss buy putting alternate pins on the perfboard pads and tack soldering leads to the other pins.

It definitely makes for smaller boards.





--
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: SMD Group Build

Jack, W8TEE
 

I just ordered two of the "middle" one. I thought I had checked eBay several months ago...must have missed these. Now...off to look for caps!

Thanks, Diver!!

Jack, W8TEE



From: Diver Martin <diver.martin@...>
To: BITX20@groups.io
Sent: Thursday, January 25, 2018 12:29 AM
Subject: Re: [BITX20] SMD Group Build


On Wed, 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.

Jack, W8TEE



From: Diver Martin <diver.martin@...>
To: BITX20@groups.io
Sent: Thursday, January 25, 2018 12:09 AM

Subject: Re: [BITX20] SMD Group Build

Jack,

Just as a point of reference:  Going for 5% tolerance 1k ohm resistors, and buying 1000 at a time, a quick search on digikey gives me:

1000x 0603 resistors:  $2.07
1000x 0805 resistors:  $3.03
1000x 1206 resistors:  $4.63

For reference
1000x axial TH resistors: $7.29.

At a half penny a pop, the cost of 1206 vs 0603 I'm betting isn't going to be a noticable difference.  (At 100qty, they're about 2x as much, ~$0.01 each, or $1 for 100).  You can really sneeze hard and not loose a lot of money.



On Wed, Jan 24, 2018 at 8:20 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
I can barely see a 0603! I would prefer 1206 if I can find them and am not too worried about the cost differential.
Jack, W8TEE


From: Clark Martin <kk6isp@...>
To: BITX20@groups.io
Sent: Wednesday, January 24, 2018 9:15 PM
Subject: Re: [BITX20] SMD Group Build


Clark Martin
KK6ISP

On Jan 24, 2018, at 5:56 PM, Diver Martin <diver.martin@...> wrote:

Mouser & Digikey are my go-to for SMT parts.  They carry just about everything.  If you have other oddball SMT stuff, and either one are out, head to findchips.com.  There are alternate suppliers, but those two always have what I need, either in the exact specified part number, or an equivalent.  Other places will source 1206's and stuff, but might only sell by the full reel (which I have yet to need, except maybe 0.01uF caps or 0.1uF caps across multiple, multiple projects).

SMD resistors/caps (0603, 5% in my case) are usually cheap enough that I buy them in 1000-piece quantity, because $2 of parts for life or $0.5 for the parts I need for the project, and to always have them on hand, is easy.


I’ve only bought from Digikey a few times but I use Mouser all the time.  Also there are Newark and Allied for such supplies.

I bought a set of 0805 resistors (from 0 ohm through several Mohms) and a set of 0805 caps (10s of pF through 1µF).  They came on cards that fit a day planner binder.  There are between 1 and four strips of 25 each for each value (depending on expected usage levels).  I have little trouble working with 0805 parts and they  fit nicely on .1” grid perfboard (with plated through holes).  

When I use up a strip I buy a new strip of 25 at a local electronics shop (Silicon Valley still has a few).

I haven’t done any PCB fabricating yet but that is in the plans.

SMD diodes and transistors of most any size are easily soldered to perfboard.

I’ve also soldered up to 8 pin SOICss buy putting alternate pins on the perfboard pads and tack soldering leads to the other pins.

It definitely makes for smaller boards.





--
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: SMD Group Build

Diver Martin <diver.martin@...>
 

Another option would be to make the kits yourself, if you wanted to market them to your club.  Use E3 resistor values (explanation here, http://www.radio-electronics.com/info/data/resistor/e-series-e3-e6-e12-e24-e48-e96.php), with basically from 1 ohm up to 1M ohm of values 1.0, 2.2 and 4.7 (So 1.0 ohms, 2.2 ohms, 4.7 ohms, 10 ohms, 22 ohms, 47 ohms, 100 ohms, etc).  Account for 7 ranges, that's 21 values.

Caps, I'd do E6 in the ranges from 10p to 100nF (5 ranges, 6 per range = 30), and then 1uF, 4.7uF, and 10uF electrolytics at 50V a pop, roughly.  If you want to build 50 kits, using the 1k 1206 as a reference, it's $16 per reel of 5000 parts (50 kits x 100 pcs per kit).  That's $0.32 per value.  21 values in resistors, 30 values in caps, and 3 values in electrolytics, you can make a pretty good kit.  The resistors would only cost you $6 per kit with 100 parts per value.

The problem with caps is that you have multiple factors / degrees of freedom.  1) Value, naturally, about 30 values would get you there 2) Material.  X7R?  NP0?  Electrolytic?  Tantalum? Some are good for RF, some are horribad, but great for bypassing power supplies.  I generally have NP0 below 1000p, and X7R above, though I do have some 10nF NP0's for specific applications 3) Voltage.  Higher voltage = larger capacitor = more material = more cost.  You don't want to spec 30 values all at 1kV, but 50V might not be good enough for all applications.  My tuner though uses 1kV NP0 caps.

I would generally say 50V is usually useful for most low power and filtering applications though, so 10->1000p @ NP0, 50V, 1000p -> 100nF @ 50V X7R.

On Wed, Jan 24, 2018 at 9:29 PM, Martin Held <diver.martin@...> wrote:

On Wed, 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.

Jack, W8TEE



From: Diver Martin <diver.martin@...>
To: BITX20@groups.io
Sent: Thursday, January 25, 2018 12:09 AM

Subject: Re: [BITX20] SMD Group Build

Jack,

Just as a point of reference:  Going for 5% tolerance 1k ohm resistors, and buying 1000 at a time, a quick search on digikey gives me:

1000x 0603 resistors:  $2.07
1000x 0805 resistors:  $3.03
1000x 1206 resistors:  $4.63

For reference
1000x axial TH resistors: $7.29.

At a half penny a pop, the cost of 1206 vs 0603 I'm betting isn't going to be a noticable difference.  (At 100qty, they're about 2x as much, ~$0.01 each, or $1 for 100).  You can really sneeze hard and not loose a lot of money.



On Wed, Jan 24, 2018 at 8:20 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
I can barely see a 0603! I would prefer 1206 if I can find them and am not too worried about the cost differential.
Jack, W8TEE


From: Clark Martin <kk6isp@...>
To: BITX20@groups.io
Sent: Wednesday, January 24, 2018 9:15 PM
Subject: Re: [BITX20] SMD Group Build


Clark Martin
KK6ISP

On Jan 24, 2018, at 5:56 PM, Diver Martin <diver.martin@...> wrote:

Mouser & Digikey are my go-to for SMT parts.  They carry just about everything.  If you have other oddball SMT stuff, and either one are out, head to findchips.com.  There are alternate suppliers, but those two always have what I need, either in the exact specified part number, or an equivalent.  Other places will source 1206's and stuff, but might only sell by the full reel (which I have yet to need, except maybe 0.01uF caps or 0.1uF caps across multiple, multiple projects).

SMD resistors/caps (0603, 5% in my case) are usually cheap enough that I buy them in 1000-piece quantity, because $2 of parts for life or $0.5 for the parts I need for the project, and to always have them on hand, is easy.


I’ve only bought from Digikey a few times but I use Mouser all the time.  Also there are Newark and Allied for such supplies.

I bought a set of 0805 resistors (from 0 ohm through several Mohms) and a set of 0805 caps (10s of pF through 1µF).  They came on cards that fit a day planner binder.  There are between 1 and four strips of 25 each for each value (depending on expected usage levels).  I have little trouble working with 0805 parts and they  fit nicely on .1” grid perfboard (with plated through holes).  

When I use up a strip I buy a new strip of 25 at a local electronics shop (Silicon Valley still has a few).

I haven’t done any PCB fabricating yet but that is in the plans.

SMD diodes and transistors of most any size are easily soldered to perfboard.

I’ve also soldered up to 8 pin SOICss buy putting alternate pins on the perfboard pads and tack soldering leads to the other pins.

It definitely makes for smaller boards.





--
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?



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

Re: Almost all of the firmware has been modified to fix known bugs and enhance CAT communications.

Ian Lee
 

You have a lot of experience with NTP servers using GPS. Excellent!
I just needed a solution because the USB sound card was too big. So I decided to remove the USB connector from the RPI and insert the sound card.
(I wanted to put the WSJT-X Portable in my pocket.)

But the USB connector was double type. So I thought I should put one more thing. At that time, the USB type GPS was shown! So the GPS module is located like that.
I have no experience with PPS. so I do not know if that GPS module supports PPS.
Synchronizing the time with the NMEA protocol is something that we have done before.
By the way, your email has motivated me to study something more.

Ian KD8CEC 


2018-01-25 2:28 GMT+09:00 <al_91dak@...>:

Cool! Did you hook up the PPS line? That would allow for time synchronization that far exceeds what is necessary for these modes, but might as well do it anyway as it is just one GPIO...
I have a Raspberry Pi based NTP server on my home network that uses the GPS+PPS method, been rock solid for years now. This also brings up other thoughts like automatically setting the gridsquare in WSJT-X.



--
Best 73
KD8CEC / Ph.D ian lee
kd8cec@...
www.hamskey.com (my blog)

Re: SMD Group Build

Diver Martin <diver.martin@...>
 

'capacitor kit 1206' -- Though, I must say... pictures are of resistors... which kinda weirds me out.  But hey, they're a few bux...  What also gives me the jibblies is there's no material spec (x7r/NP0/etc), nor voltage on these kits....


Cheers,
Martin

On Wed, Jan 24, 2018 at 9:36 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
I just ordered two of the "middle" one. I thought I had checked eBay several months ago...must have missed these. Now...off to look for caps!

Thanks, Diver!!

Jack, W8TEE



From: Diver Martin <diver.martin@...>
To: BITX20@groups.io
Sent: Thursday, January 25, 2018 12:29 AM

Subject: Re: [BITX20] SMD Group Build


On Wed, 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.

Jack, W8TEE



From: Diver Martin <diver.martin@...>
To: BITX20@groups.io
Sent: Thursday, January 25, 2018 12:09 AM

Subject: Re: [BITX20] SMD Group Build

Jack,

Just as a point of reference:  Going for 5% tolerance 1k ohm resistors, and buying 1000 at a time, a quick search on digikey gives me:

1000x 0603 resistors:  $2.07
1000x 0805 resistors:  $3.03
1000x 1206 resistors:  $4.63

For reference
1000x axial TH resistors: $7.29.

At a half penny a pop, the cost of 1206 vs 0603 I'm betting isn't going to be a noticable difference.  (At 100qty, they're about 2x as much, ~$0.01 each, or $1 for 100).  You can really sneeze hard and not loose a lot of money.



On Wed, Jan 24, 2018 at 8:20 PM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
I can barely see a 0603! I would prefer 1206 if I can find them and am not too worried about the cost differential.
Jack, W8TEE


From: Clark Martin <kk6isp@...>
To: BITX20@groups.io
Sent: Wednesday, January 24, 2018 9:15 PM
Subject: Re: [BITX20] SMD Group Build


Clark Martin
KK6ISP

On Jan 24, 2018, at 5:56 PM, Diver Martin <diver.martin@...> wrote:

Mouser & Digikey are my go-to for SMT parts.  They carry just about everything.  If you have other oddball SMT stuff, and either one are out, head to findchips.com.  There are alternate suppliers, but those two always have what I need, either in the exact specified part number, or an equivalent.  Other places will source 1206's and stuff, but might only sell by the full reel (which I have yet to need, except maybe 0.01uF caps or 0.1uF caps across multiple, multiple projects).

SMD resistors/caps (0603, 5% in my case) are usually cheap enough that I buy them in 1000-piece quantity, because $2 of parts for life or $0.5 for the parts I need for the project, and to always have them on hand, is easy.


I’ve only bought from Digikey a few times but I use Mouser all the time.  Also there are Newark and Allied for such supplies.

I bought a set of 0805 resistors (from 0 ohm through several Mohms) and a set of 0805 caps (10s of pF through 1µF).  They came on cards that fit a day planner binder.  There are between 1 and four strips of 25 each for each value (depending on expected usage levels).  I have little trouble working with 0805 parts and they  fit nicely on .1” grid perfboard (with plated through holes).  

When I use up a strip I buy a new strip of 25 at a local electronics shop (Silicon Valley still has a few).

I haven’t done any PCB fabricating yet but that is in the plans.

SMD diodes and transistors of most any size are easily soldered to perfboard.

I’ve also soldered up to 8 pin SOICss buy putting alternate pins on the perfboard pads and tack soldering leads to the other pins.

It definitely makes for smaller boards.





--
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?





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