[Elecraft] K2 with narrow USB transmit audio

[Don Wilhelm]

Chris,

That condition is normally the result of improper alignment of the BFO 
frequencies for the upper sideband.
There should be no difference is width for LSB and USB that could be 
blamed on a part.

Use an audio spectrum analyzer (Spectrogram for instance) for best 
results when aligning the filters, and set the low frequency "knee" of 
the passband at 300 Hz.  If possible use a broadband noise generator at 
the antenna connection, or you can often use "dead band noise" (no 
signals within the bandpass).

73,
Don W3FPR

On 11/5/2022 6:41 PM, Chris wrote:
> Hello,
>
> I have three K2's, and one of them has a very strange symptom.  It works
> well in LSB and CW, but USB transmit audio seems very narrow.  Receive
> audio in all modes works well with no issues.
>
>