Re: Need KN-7QA Troubleshooting help, Xmt Carrier not suppressed

Dan Pflugrath

The KN-7QA seems to be working well.  I found the BFO trim capacitor was not working properly.  I replaced it and when using the 5 pF capacitor in series rather than the 27 pF I can move the audio pass band both slightly above and below the desired range of 350 to 2200 Hz.  The suggested audio spectrum analyzer and tone audio generator sound card software were very helpful tools.. Thanks 73 Dan KA7GPP

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