[hpsdr] It lives - but....

[Paul Fletcher]

Got my HPSDR transceiver on air this evening with the 100W PA, all generally 
fine with some good audio reports. However, I am getting RF feedback in the 
headphones (not on the transmitted signal) and wondered if anyone else has 
experienced this? I get nothing when using a dummy load but get feedback 
when using a well matched antenna (and there is nothing coming up the 
outside of the coax either - it's well choked and I've had a clamp on RF 
ammeter on it as well).

I'm thinking grounding issue (only think connected to Mercury is the 
headphones and the coax).

Suggestions welcome as always.

Paul M1PAF