[Elecraft] RF feedback? only when using KXPA100

[David F. Reed]

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.dave at 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.dave at 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