[Elecraft] BFO Dumb Question

[Ron D' Eau Claire]

> When I did the adjustments, I did it on
> 30 meters using the background noise.  I noticed that the DAC
> value must be
> below the value where the pitch is the lowest on bands lower than
> 18Mhz and
> above on bands above 18Mhz (per the doco).  Do I have to go back
> and adjust
> the filters for the upper bands so that the values are above the DAC?...
> Are these values supposed to change on the upper bands (DAC value
> above the
> Lowest Pitch DAC value)?

No, you do NOT have to adjust the filter for the various bands. Do it on ONE
band only per the adjustment procedure and it will be right for ALL bands.
That's the big advantage of a Superhetrodyne receiver: whatever frequency
you are tuned to is converted to the intermediate frequency where the
filters are. They are tuned exactly the same for every band.

I don't know what you mean by "lowest pitch value". In following the
spectrogram procedure, you will not care at all what the value of the BFO
frequencies are(represented by the numbers you have above).  This is not the
time to get inventive. Get it working per the procedure, then you can play
around all you want, knowing that you can always "put it back" if you get
"lost".

If you are like a lot of us (me included) the first couple of weeks you have
the K2 running you will probably tinker with the filter setup using
Spectrogram as much as you operate on the air <G>

Ron AC7AC
K2 # 1289