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Ken T VK2HXX
 

Hello all.  I have burnt off the tracks on the relay section of my uBitx V3 (c) through trying to work through illness. I am trying to find a photo of the top and bottom section of the board showing where the tracks are going in order to run jumpers.  Any help appreciated. Thanks
 73s Ken VK2HXX

Gary Anderson
 

The Wiki has pictures, consider a rebuild to the section per Allison's mod.
https://groups.io/g/BITX20/wiki/7528
Rgds,
Gary

 

Hi Ken,

I did Alison's changes for the relays on my v3.  It might work well for you, as with the relays mounted on the bottom side, their pins all end up on the top side where most of the traces are.  I can upload pictures of my board if you want.  The work will require changes to the raduino code afterwards.

73,


Mark

Bob Lunsford
 

I suggested mounting the relays on the opposite of the board's ground plane as you say back in the days of the V4 and I remember someone trying it. The results from him was it provided no great improvement as far as meeting FCC requirements, at that time.

Please let us know if this does provide an improvement since the board for the V3 and the V4 may not be exactly the same.

This would also mean making sure the four corners of the board are mounted to a metal box, for example, to make sure the ground plane is indeed at an effective ground for the RF signals and possibly ensure a better overall ground.

Bob — KK5R

On Wednesday, July 8, 2020, 2:50:31 PM EDT, Mark - N7EKU <n7eku@...> wrote:


Hi Ken,

I did Alison's changes for the relays on my v3.  It might work well for you, as with the relays mounted on the bottom side, their pins all end up on the top side where most of the traces are.  I can upload pictures of my board if you want.  The work will require changes to the raduino code afterwards.

73,


Mark

ajparent1/kb1gmx <kb1gmx@...>
 

Bob,

Mounting from the back side was only part of a complete mod.  Do only partial
and you get poor result.  Basically for that iteration a half fast fix was not a fix at all.

See the wiki for the fix and wiring plus the code patch to take advantage of it.
Also if you burnt the tracks off that give you head start.

If you still burning off tracks investigate a better tool and or soldering skills.

The Mod I wrote up for V3. 

By V4,  V5, and 6 it was incorporated into the board layout.  We have a Wiki
here for history and knowledge.


Allison
---------------------------------
No direct email, it goes to bit bucket due address harvesting in groups.IO

Ken T VK2HXX
 

Thanks Gary. It was helpful to have something to follow.  I was changing to Axicom relays and have put the affected section on a daughter board.
Thanks again Stay safe Ken

Ken T VK2HXX
 

Thanks to all that replied. All is good now.
Regards Ken VK2HXX