When turning on the TRX with 13.8V supply, it makes strange noises and you can't hear any signal/noise. If i'm lowering the voltage to about 11.8V, RX works without problems.
I have replaced Q9002 (12V Voltage Regulator), Q9003 (Switching Controller) and Q9001- still the same.
Any idea what to check next? I'm a little bit lost with this one..
?
Here is a video of the problem with sound: https://www.youtube.com/watch?v=sZzLsMEYBV4
Sebastian Petters