Hello,
Now I¡¯m asking for your help.
I have on my own homebrew? Ubitx, a beep "tic tac"? on my construction.
This comes from the Arduino¡¯s SDA and SCL signals that communicate with the SI5351 module. The frequency of these signals varies with the MasterClock setting.
I tried this on.
Capacitor on the different supply points of the circuits.
Cut the Volume tracks and put the potentiometer close to the amplifier. (With shielded cables)
Switch off the amplifier 12V track and connect directly to the 12V power supply.
Test with separate power supply for amplifier.
Disassembly of my SI5351 (Removable) and welded as close as possible to the Arduino (1 cm wires)
Si5351 Shielding.
No tested: Put the Arduino on the other side of the PCB.
No tested: 2 powers one for Arduino, other 12V? (Like no regulator 12v? -->? 5v). See my other post.
Your ideas
cdt
Gerard