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 ¡ª 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.
Bob Lunsford