[Elecraft] K2 14 crystal replacement results. K2 system gain results

[Ron D'Eau Claire]

Like Larry, W2BVH, I found it hard to judge the OPT-1 filter performance
by looking at Spectrogram, but the difference in the "sound" of the
filter when monitoring my own SSB transmission was tremendous! 

Keep in mind that the problem is NOT "bad crystals" in general, but SOME
kits with SOME "bad crystals" that produce filters with either too much
insertion loss or too narrow of a bandwidth for SSB. So even with kits
with adjacent serial numbers, one may see a big improvement and the next
one will see none at all. 

Mine had no insertion loss problems, but my OPT 1 filter was way too
narrow for decent SSB quality. I had to change all of the crystals, of
course, so I'd have a "matched set" after putting in the new ones for
the OPT-1 filter. 

Ron AC7AC
K2 # 1289