[Elecraft] K3 #8862 unwanted sidebands

[Rich]

I may have had the same issue as you.   Elecraft instructed me to listen 
to my SSB signal via the monitor, start at 10watts and as you speak 
start increasing the power.   When you reach 12-15 watts I bet you will 
hear your audio become distorted, sounds sort of like RF on your audio.  
If not then you have a different issue.

You may want to try that test.  For me it require a trip to the factory 
for repair.

Rich

On 11/15/2022 8:27 AM, Martin Schmiedel wrote:
> Elecrafters,
>
> i have 2 K3's, #8862 and #2878.
>
> Listeners using Panorama adapter gear like P3 or sdr radios report 
> unwanted strong sidebands when #8862 i bought from a friend  is in use.
>
> All is fine when #2878 is in use with same settings, power, external 
> amp, antenna and same mic.
>
> The signal itself inside the ~3khz passband is fine, both K3's sound 
> about the same , all ok.
>
> One listener said, the problem vanishes, when power is below 12W (only 
> low power stage in use).
>
> I build a K2 (#2706)  and the K3 #2878 myself, so i'm not scared to 
> take #8862 apart to find the cause.
>
> Where to begin?
> TNX.
>
> -- 
>
> 73, Martin
>
>
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