Great news; found it!

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.
Hurrah!

73 de Dave, W5SV

On 8/6/17 12:12, Mike Flowers wrote:
Good to find the root cause.  Fix will be an easy one.

-- Mike Flowers, K6MKF, NCDXC - "It's about DX!"

On Aug 6, 2017, at 10:07 AM, David F. Reed <w5sv.d...@gmail.com> wrote:

Mike, it is clean on a dummy load; I guess I need to track down if I have lost 
my ground somewhere, or find the feedback path...

73 de Dave, W5SV


On 8/6/17 00:13, Mike Flowers wrote:
Hi Dave,

Have you tried this using a dummy load?  May be useful to eliminate RFI as a 
cause.

-- Mike Flowers, K6MKF, NCDXC - "It's about DX!"

On Aug 5, 2017, at 9:26 PM, David F. Reed <w5sv.d...@gmail.com> wrote:


This did not used to happen; it is new to my set-up, nothing I am aware of has 
changed...

When trying to operate JT65, if I set the power to 10 watts, everything is fine 
(KXPA100 is not active).
If I set to anything above 10 watts (yeah, like 11 watts or more), I get bad RF 
feedback (sounds like motor boating in monitor).
SWR via tune looks good, all cables have been taken out, checked and 
re-inserted.

I am stumped and looking for hints as to what I ought to look at next, or 
re-check or try.

Thanks & 73 de Dave, W5SV

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