[Elecraft] RX/TX different?

Don Wilhelm [email protected]
Wed Jan 7 11:15:00 2004


Mike,

It sounds to me like your SSB FL1 BFO settings are not correct.
Look at the Dial Calibration article on my website www.qsl.net/w3fpr for a
complete discussion of what needs to be done.  Step 3 details the CAL FIL
part of the procedure and includes links to additional information if you
need it.

Yes, The N6KR method is one of the best for attaining dial calibration
accuracy, but to repeat, in your case, I believe you will need to adjust the
BFO settings to place the SSB passband correctly in the proper part of the
audio spectrum.

If you are observing the WWV markers at 500 and 600 Hz using Spectrogram,
you ARE tuning WWV to 'zero beat' properly (use LSB or USB for this - CW
introduces a recieve offset).

73,
Don W3FPR

----- Original Message -----

When I tune in WWV using Spectrogram e.g., set markers for 500/600hz on
even/odd minutes (respectively) and/or use a 1Khz 'at the tone' marker my RX
displays 9999.99 Khz. I can live with that.

Yet there have been a few SSB contacts that that I tell me they are
receiving me 'low'. i.e. if someone is (supposedly) on 18150.0 I have to
tune to 18150.22 for them to tell me I'm now xmitting on 18150.0

First, I hope this isn't displaying too much ignorance re: the K2 but I'm
not clear how there could be a difference between my displayed RX/TX freq
(Yes, I've re-run VFO linearization). Anyone have a brief explanation if/how
this is possible?

Since TX accuracy is more important than RX I'd like to fix it (especially
now that I'm getting back into CW in a big way). Would using Waynes 'new'
technique for dial calibration via WWV be the answer?

Obviously, the resulting dial accuracy is dependent on just how precise one
can tune in WWV. I should be able to 'zero beat' precisely to WWV using
Spectrogram, right? i.e. after I dial in WWV using the markers per above I
can then adjust C22 using Waynes method (e.g. via CAL FCTR and alternating
between TP1 & TP1 until the two test points match, then run CAL PLL)?