Re: Sotabeams CW filter problem

KD8CGH
 

I tried the filter outboard on the bench and it was fine.

Recently I was poking around with the power on and I discovered that touching ground to the filter affected the noise. Although the ground was adequate to power the filter, it apparently failed to prevent noise. The 3.8 kHz and 7.8 kHz tones disappeared when the ground to the filter board was improved.

      Bob   KD8CGH

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