Vic,
Thanks for the comments. Last one first, the signal is clean, pick up in
a spectrum analyzer shows the spurs are well below 40 db down.
Is there an rf conducting grease that should be used on the contacts?
I haven't checked the ground. It is simply a copper stake driven in
about 6 feet.
Thanks - Dan
Vic K2VCO wrote:
> Dan Sawyer wrote:
>
>> The background: I am tuning a long wire, about 100 feet long.
>
>> The issue is: When a small about of power, a watt or less is applied
>> things work well, the SWR is close to 1:1. However if more power is
>> applied the 'tune' point jumps a couple of hundred kc and the SWR
>> jumps accordingly.
>
> One possibility is that a large amount of RF on the 'grounded' side of
> the tuner is upsetting the SWR measurement. You say it worked before
> -- have there been changes in the path from the tuner to ground, or to
> whatever is serving as the counterpoise for this antenna?
>
> Another possibility is that your transmitter is generating a spurious
> signal at a frequency close to the operating frequency when the power
> is raised above a certain point. I've had this problem with
> sold-state amplifiers.
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