[Elecraft] RF feedback? only when using KXPA100

[Jim Brown]

On 8/6/2017 5:25 PM, David F. Reed wrote:
> It was a connection to my coax switch; take it out of line, it goes 
> away. re-connected, it comes back.  Cleaned the connections and 
> reconnected, it is gone. 

Many years ago, a very smart guy said something it the effect that with 
any problems with TX or RX, ALWAYS check for bad coax FIRST. From lots 
of experience, I've learned the value of that. First things to check are 
the SHIELD connections, any junk connectors and adapters (if it doesn't 
say Amphenol, it's probably junk).

If you "cleaned the connections" and fixed it, there's a good chance 
that the problem is still there, lurking as an intermittent shield 
connection that will return. Or maybe the switch is poor.

73, Jim K9YC