[Elecraft] USB FL4 problem after installing BFO and filter xtals

[John McClain]

I am very pleased with the results after installing the BFO and filter
xtal mods in K2 #2569 except for one little problem.  USB FL4 wants to
receive the lower sideband instead of the upper one. The waveshape on
Spectrogram looks great but it is on the lower sideband.  I can tune
in a USB station and then got to CAL FIL where I step through the 4
filters while listening to the audio and watching the waveshape.  I
get great audio on filters 1, 2, and 3 but when I get to 4, I hear the
station but it sounds like I am listening to LSB on a USB station.
While there I can adjust the BFO frequency but it never seems to move
over to the "other side".  I have checked all of the xtals and their
solder connections on the SSB adaptor but I can see nothing wrong.
Anyone have any ideas?

John
K7SVV
k7svv@arrl.net
K1 #1378, K2 #2569, SST 20, Rock Mite 20, Rock Mite 40, Nor'Easter