What are you using for the 12v supply? Wall warts can be problematic.
Seems that those that embed switching power supplies are pretty noisy. I
recently pulled one out of the shack after tracking down all sorts noise
coming from it. Seems that it was getting into the rig through the rig's
DC power supply; most likely conducting back onto the AC line and
sneaking back in through the power supply.
Pat
WB2GBF
K1TTT wrote:
> FINALLY! The Gremlin has been slain! ...
**SNIP**
> ... pull the power from the 20m
> and 160m meters just in case... SILENCE! I'll test more after CQWW SSB, but
> my best guess is that something in the PEP circuit that gets 12v power was
> rectifying and resonating with the coax stubs on the different stations... 7
> sources, all in the shack! Well, I did get lots of ugly stuff cleaned up
> outside anyway... maybe there were some other sources outside also... in any
> case now we can have a nice quiet contest without QRM from ourselves anyway!
>
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