[Elecraft] K2 with narrow USB transmit audio

[Chris]

Hi Don,

Thank you for the info.  The issue with my K2 is with the transmit audio,
so would the same BFO frequency for the receiver affect the transmitter?

Best,

Chris KM1B


On Sun, Nov 6, 2022 at 1:56 PM Don Wilhelm <don at w3fpr.com> wrote:

> 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.
> >
> >
>
>