[Elecraft] KSB2 OP1 filter USB response...

[Steve Kallal]

It has been a few weeks since I built the KSB2 option. There is one problem
I haven't yet resolved. The response on the USB side of OP1 is not as broad
as the LSB side, and has a narrower peak. I didn't pay much attention to
this before. I've never transmitted in USB except for the digital modes
using RTTY reverse. I'm not much of a SSB guy.

These observations were made with the Spectrogram software. The symptoms are
quite noticeable by listening also.

73,

Steve N6VL
K2 #2289