[Elecraft] KSB2 OP1 Filter BFO adjustment for xmit
Ron D'Eau Claire
rondec at easystreet.com
Sun Feb 12 22:31:18 EST 2006
Cathy, N5WVR wrote:
Thanks to Don and everyone who replied. I have whipped up the connector
cable and calibrated everything with Spectrogram. I don't know how well
the result will sound, but the passband sure looks like it's in the
right place now. :-)
----------------------
I found that after I had it set up with Spectrogram I wanted to 'tweak' the
BFO frequencies slightly for best SSB audio quality, just as the SSB manual
suggested. In my case, it helped a lot to move the bandpass slightly farther
from the carrier - up to nearly 400 Hz at the -3 dB points. It'll vary with
your voice and the mic you use, but that's easily done by monitoring your
signal on another receiver. If possible, record it and listen to the
playback. Of course you can do that in the air too. Temporarily install the
FCTR probe in the test point, then during the QSO bump the BFO setting in
small increments while someone you trust reports on the change.
Ron AC7AC
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