Hello everyone,
Just for information to all that have the problem. I have found the source of the problem. It is a faulty relay in a power amplified board. In my case the relay was the one that switches RX from GND to antenna for 20m band.
Re-soldering the relay contacts did not help and when listen to the noise and kick the relay, the noise become attenuated and come back within a minute or less. It looks like that there are some internal contact issue in this relay.?
Just ordered from Conrad SY-12W-K relays? to replace them. Also found same problem on 15m band but this relay is working more stable, showing the same issue not always. Any case will change it also.?
Arman, EK1ET
?
?
