[Elecraft] BFO Dumb Question

[Ron D' Eau Claire]

 start to hear a CW signal at 7022.44.  I keep
> tuning up
> and I can zero beat him at 7022.71. Tuning up, the CW signal disappears at
> 7023.4.  I zero beat him again on 7023.93.  Then disappears again
> at 7024.5.
> Which side is he on?  (i.e., which frequency is he transmitting on).  I
> think 7023.4.  If that is the case, which side of the BFO should
> I zero beat
> on him?  I understand what the BFO does and what I hear in the speaker is
> the difference BFO frequency.
> Thanks
> Jason N8XE
> K2 #1270

Jason, You need to do the BFO/Filter adjustment in your K2 again.

It sounds like you have the BFO frequencies set to the filter bandpasses are
'straddling' the zero beat frequency, and that's why you are hearing a
response on both sides.

A properly aligned K2 will exhibit a 'single signal' response, meaning that
you can hear the station on only one side of Zero Beat (that's where the
signal disappears, NOT where you can "zero beat" it with the sidetone).
That's a function of the bandpass of the K2's i-f filters and the setting of
the BFO.

If you use a very low beat frequency and tune in a very strong signal, you
may hear a little response down near zero beat on the "wrong" side, but
normally you should hear nothing on the "other side".

Ron AC7AC
K2 # 1289