[Elecraft] K3 SSB - Is the 5 pole filter good enough

[John A. McCabe]

 >On USB the trace was substantially flat with the -3dB points at 430Hz 
and 2.77KHz. Not too bad >and could probably be improved by moving the 
carrier offset frequency.
 >On LSB, however the trace was far from flat having a slope from audio 
LF to HF of about 6dB. >Not very good at all...
 >I wonder if others have plotted their 5 pole filters.

Stewart,

I just ran a similar test using spectrogram and it confirms what I 
thought I heard with my ears and was similar to the results you got. It 
was basically flat on USB but was sloped about the same amount on LSB.

73,

John, KD8K



>