[Elecraft] SSB Filter Flatness anomaly

[k6se@juno.com]

Fran wrote:

"I have been working on the filter flatness modification and have come
across something that does not seem to make sense to me.  The filter
response only looks like I would expect in the 'wrong' SSB mode.  That is
things look flatter in USB than LSB on 40 meters and LSB is flatter than
USB on 15 meters."
==========
This reversal normal for all K2s because the VCO signal injection into
the mixer can be on the high-side or the low-side, depending on the band.
 For 17-meters and below, it is on the high side of the received signal
and for 15-meters and above, it is the low side.  Either way, the desired
4.915 MHz intermediate frequency is achieved, with the accompanying
apparent reversal of sidebands on both SSB and CW.

73, de Earl, K6SE