[Elecraft] New KX1 low power and 20m oscillation

[Don Wilhelm]

Stan,

Without a 'scope or Spectrum Analyzer connected to your KX1, I don't 
know haw to answer, but my best guess is that you have a 20 meter low 
pass filter that has a cutoff frequency that is lower than normal 
(spreading the LPF turns will help with that, while the LPF cutoff for 
40 meters is too low for whatever reason or another, and that must be 
resolved.

Run the KX1 into a dummy loaqd thaqt is known to be 50 ohms resistive at 
7.000.000 aettinbe



On 5/7/2012 11:22 PM, Stan Gibbs wrote:
> Don Wilhelm-4 wrote
>> Try spreading the turns out evenly over the full diameter of the core.
>>
> Which core are we talking about?  The manual says to "squeeze" the windings
> of L2 if the 40m power is lower than 20m. I tried that and it did seem to
> raise the 40m power, though still not as high as 20.
>
> I think some of the extra power on 20m is due to the spurious sidebands that
> I observe. I really would like to understand what is causing that phenomenon
> because it tells me something just isn't right and because I don't feel
> comfortable operating with such a signal, despite the fact that other
> stations give me good reports.
>
>
> -----
> 73, Stan - KR7C
> --
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