Date   
Re: Apache Case on Sale

Vince Vielhaber
 

Thanks! I missed that one. It's good till 3/31 with a limit of 3 too!

Vince.

On 01/26/2018 09:01 AM, Jack Purdum via Groups.Io wrote:
All:

Harbor Freight has their small Apache chase on sale for the month of
February. */Inside/ *dimensions are:

Length: 8-3/8"
Height: 3-3/4"
Width: 5-11/16"

The case is similar to a small Pelican case, water resistant, and very
rugged. If you get their flyer, the coupon is on p. 16. The price is
reduced from $15 to $10.

Jack, W8TEE

Re: SMD Group Build

Michael Hagen
 

I got a USB microscope a few years back, it looks a little different than that.  eBay about $25?

AND, yes, it works great for that.  And you can snap pictures.  I used it to investigate a failure on a product a friend manufactures.   The software seems to be universal.  I changed computers, did a search, and got it running again.

I noticed now they have them with built on displays too, for more bucks? 

Mine is all metal looking with a base plate like a drill press sort of?  You get rough focus with the distance, then there is a threaded adjuster for fine.

I am real happy with it.

73's

Mike, WA6ISP


On 1/26/2018 7:07 AM, Michael Monteith via Groups.Io wrote:
For myself I was thinking about getting one of these.   If nothing else great for close inspection of solder joints etc.

New Mega Pixels 1000X 8 LED USB Digital Microscope

73, Michael
KM4OLT

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

Re: Second batch of uBITX shipping? #ubitx

Joel Fournol
 

j'ai commandé le mien le 15 décembre et toujours rien reçu pas d"avis ni de numéro de suivi ,seulement un post de HF Signals de patientez??

Re: Something has been blown

Arv Evans
 

César EA3IAV

I would not worry too much about using Ebay sourced IRF510s.  Apparently
International Rectifier no longer makes the IRF5xx line of devices but has
licensed Samsung and others to manufacture them.  Many of these licensed
units then become available through Ebay vendors.  In modern solid state
manufacturing most all devices are tested with software controlled test
setups so possibility of a bad device reaching the marketplace is much less
than was the case in past years. 

It is possible that only one of your MOSFETs is bad.  This could explain the
ability to adjust current and current flow when the PTT is activated.

A power supply that has current limiting might be a good way to power your
BITX.  Something around 3 amps should be adequate to keep from frying the
MOSFETs and still be adequate for normal operation.

Strong near-field reception is normal as long as there is some signal being
generated.  Leakage through power cables and control wiring is locally 
quite strong, even if the finals are not working.  If only one IRF510 is working
and you are adjusting the bias as if two were working it could be that you are
running that one device in a relatively linear mode due to higher than normal
current.  This could also explain strong signals on a local receiver. 

Arv  K7HKL
_._










On Fri, Jan 26, 2018 at 12:31 AM, César EA3IAV <Cesarleon@...> wrote:
Hi follks for the the ideas!
Antenna was matched with less than 1.4 swr
transistors were isolated and tested.

The only thing I can think of is that maybe, before considering to have the fets atached to the box I may shorted them by accident while initial testing

One doubt: even if they are blown, why i can transmit and be received in a nearby receiver? is it possible?
why it drains power if they are blown?

maybe it is just ine of them blown?

this afternont I will inspect tracks. I have some spare irf510 from ebay, but i was trying not to swap them because I don’t know if they are legit and the checking scenario could go very crazy with errrstuc fets...


Re: Apache Case on Sale

John P
 

Here's a link! This if the January flyer, so it doesn't show the sale price.
--
John - WA2FZW

Re: SMD Group Build

Michael Hagen
 

Good USB Microcsope

https://www.ebay.com/itm/Andonstar-500X-2MP-USB-Digital-Microscope-Video-webcam-Magnifier-Camera-Stand/371767002110?epid=1795612812&hash=item568f0a43fe:g:iGEAAOSw9~5ZS5DJ


On 1/26/2018 7:33 AM, Michael Hagen wrote:

I got a USB microscope a few years back, it looks a little different than that.  eBay about $25?

AND, yes, it works great for that.  And you can snap pictures.  I used it to investigate a failure on a product a friend manufactures.   The software seems to be universal.  I changed computers, did a search, and got it running again.

I noticed now they have them with built on displays too, for more bucks? 

Mine is all metal looking with a base plate like a drill press sort of?  You get rough focus with the distance, then there is a threaded adjuster for fine.

I am real happy with it.

73's

Mike, WA6ISP


On 1/26/2018 7:07 AM, Michael Monteith via Groups.Io wrote:
For myself I was thinking about getting one of these.   If nothing else great for close inspection of solder joints etc.

New Mega Pixels 1000X 8 LED USB Digital Microscope

73, Michael
KM4OLT

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

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

uBitX - Replacement microphone

Sajid Rahum
 

Gurus

Need help.  I am still awaiting my ubitx and piecing up all other pieces e.g. box, connectors ahead of getting the unit.

For the microphone, has any one used regular Baofeng/Wouxun hand microphone/speaker.  Any recommendation on other kind of microphones i can use non RJ-45 and associated connections I need to make for it.  I am open to using regular computer type of microphone as well if required.

Re: batch shipping

Sajid Rahum
 

Same here; mine was placed on 23rd Dec; acknowledgement of receipt on 31st Dec but nothing thereafter.

Re: Modular BiTX40

ON6RF
 

Wow...
Just wow.

I can't tell you how good I felt when I saw your post... Congratulations on finishing this build! It looks really nice! And kudos for using it as learning material for your classes :)

Did you find any design errors on the PCBs?

I'll have to finish my version one day... :3

73 de Manoel - ON6RF

Re: Something has been blown

César EA3IAV
 

Thank you Arv

It is weird. I was adjusting the pa with the blue squares and the fuse blew. I changed the fuse and it happened again. It was like that until i changed the transistors... i have quite a few.
now still no power out visible through power meter even in lowest selectir (2w mode)
0,5amps while ppt but as i speak there is no increase on that 
i can hear myself in a close receiver  though...
i feel like these fets are bad

what else could br the reason to not output power?
what is that round blue trimmer for?

i do receive fine btw

i am going tonmy local electrinic shop to buy more fets and fuses 😟

Re: remote display was Apache Case on Sale

Rod Davis
 

Jack,

I used 6 inch Dupont wires with no shield-no apparent problems.

Rod KM6SN



On 01/26/2018 06:43 AM, Jack Purdum via Groups.Io wrote:
I think there are a number of people who have moved the display away from the main board to give them some flexibility in terms of display placement. Evidently, some shielding is needed, but I think I recall someone simply wrapping the cable in foil mitigated the problem. I'd like to hear from anyone who has moved the display and what their experience is.

Jack, W8TEE



From: KE0GYC <dragonfanatic90@...>
To: BITX20@groups.io
Sent: Friday, January 26, 2018 9:24 AM
Subject: Re: [BITX20] Apache Case on Sale

I love the idea of a "portable field radio" with all the controls on the top in a watertight case like this.  I'm thinking of modeling it after a bitX40 build I saw here, and this case looks like the perfect size!

Is there any reason I couldn't do that with the uBitx?  It looks like the LCD plugs directly into the board, but would it give me noise issues if I used a short length of ribbon cable to move the LCD to face upwards?



Virus-free. www.avast.com

Re: remote display was Apache Case on Sale

Jack Purdum
 

That's good news! I'm thinking of using ribbon cable and grounding every other wire.

Jack, W8TEE



From: Rod Self <km6sn@...>
To: BITX20@groups.io
Sent: Friday, January 26, 2018 11:35 AM
Subject: Re: [BITX20] remote display was Apache Case on Sale

Jack,
I used 6 inch Dupont wires with no shield-no apparent problems.
Rod KM6SN


On 01/26/2018 06:43 AM, Jack Purdum via Groups.Io wrote:
I think there are a number of people who have moved the display away from the main board to give them some flexibility in terms of display placement. Evidently, some shielding is needed, but I think I recall someone simply wrapping the cable in foil mitigated the problem. I'd like to hear from anyone who has moved the display and what their experience is.

Jack, W8TEE



From: KE0GYC <dragonfanatic90@...>
To: BITX20@groups.io
Sent: Friday, January 26, 2018 9:24 AM
Subject: Re: [BITX20] Apache Case on Sale

I love the idea of a "portable field radio" with all the controls on the top in a watertight case like this.  I'm thinking of modeling it after a bitX40 build I saw here, and this case looks like the perfect size!

Is there any reason I couldn't do that with the uBitx?  It looks like the LCD plugs directly into the board, but would it give me noise issues if I used a short length of ribbon cable to move the LCD to face upwards?



Virus-free. www.avast.com



Re: Something has been blown

Arvo W0VRA
 

On Fri, Jan 26, 2018 at 08:23 am, César EA3IAV wrote:
i am going tonmy local electrinic shop to buy more fets and fuses 😟
At least you have a local shop to buy something like that!

Slack Client group

Richard E Neese
 

Might I suggest we get a slack group going where we can talk real time and interact. living by email is a bit hard as it seems to pile up fast you can make a group with channels like bitx20 bitx40 ubitx so people can join multi rooms and also beable to do  more realtime discussion and interaction ?

Re: Something has been blown

Jerry Gaffke
 

Not very weird.  
First off, RV2 and RV3 are wired backwards, so fully clockwise is minimum bias voltage to the gates.
You must go through the adjustment procedure whenever the IRF510's get changed,
as each IRF510 is different.
The procedure to adjust RV2 and RV3 is here:  http://www.hfsignals.com/index.php/ubitx-tuneup/
Basically, start out fully clockwise on both, then with ptt pressed adjust one for an additional 100ma
of current draw into PA-PWR, and then the other for an additional 100ma.

If RV2 and/or RV3 get turned too far up, the heavy drain currents will quickly blow the IRF510.
It is a very quick transition as you are turning those pots from "about right" to "way too much". 

Jerry


On Fri, Jan 26, 2018 at 08:23 am, César EA3IAV wrote:
It is weird. I was adjusting the pa with the blue squares and the fuse blew.

Re: uBitX - Replacement microphone

Jerry Gaffke
 

Search for "baofeng" in this forum and you get dozens of hits, 
Here's one:   https://groups.io/g/BITX20/message/25195


On Fri, Jan 26, 2018 at 07:52 am, Sajid Rahum wrote:
For the microphone, has any one used regular Baofeng/Wouxun hand microphone/speaker.

Re: Something has been blown

Jerry Gaffke
 

I'd leave the round blue trimmer where it was set at the factory.
It adjusts how much transmit signal power is sent on to the IRF510's.


On Fri, Jan 26, 2018 at 08:23 am, César EA3IAV wrote:
what is that round blue trimmer for?

Re: Slack Client group

Richard E Neese
 

From: Richard E Neese
Sent: Friday, January 26, 2018 12:05 PM
To: BITX20@groups.io
Subject: [BITX20] Slack Client group

 

Might I suggest we get a slack group going where we can talk real time and interact. living by email is a bit hard as it seems to pile up fast you can make a group with channels like bitx20 bitx40 ubitx so people can join multi rooms and also beable to do  more realtime discussion and interaction ?

 


Virus-free. www.avast.com

Re: Slack Client group

Rob Snow
 

I was thinking the same thing, something a bit more interactive than an email list.  I'll sign up.

Re: Slack Client group

Arvo W0VRA
 

One of us set up a discord group.  Many joined, few are on.

https://groups.io/g/BITX20/topic/7355353#35099