[Elecraft] K3. S/No:4250

[David Windisch]

Hi, Eric:
What was I thinking?! <grin>  I did this same thing to myself a few years
back by messing the offsets up in some bit of experimentation I was doing. 
Forgot all about it, of course.  The fix for my situation then was found in
the K3 manual.
Here is a quote from p38 of the online K3 Manual:

QUOTE
You should also use crystal filters with closely
matched offsets (CONFIG:FLx FRQ). Otherwise,
you may hear a slow phase modulation (similar to a
beat note) between the two receivers on some
signals. 8-pole filters are already matched (FLx
FRQ = 0.00). Elecraft can provide pairs of 5-pole
crystal filters with offsets within 40 Hz of each
other on request. When setting up FLx FRQ, use
the average of the filters’ marked offsets as the
value entered for both filters (main and sub). If you
enter different offsets, you’ll hear phase
modulation, even if the offsets are very close.
UNQUOTE

Brgds,
Dave, N 3HE

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