[Elecraft] N6KR's 4 MHz oscillator cal method for the K2

[John MacKenzie]

Don,

After pondering this all morning I'd say I moved myself off frequency
roughly 360Hz :( I cannot hear WWV well enough to tell where the audio
sounds reasonable, if I could this would be a lot easier. The method of
calibrating c22 was easy, but it requires being able to be certain your on
the reference frequency to begin with....I wasn't.

I made the assumption I was splitting the difference of the WWV carrier
which I thought would put my display at zero. Either that doesn't really
work that way or I tuned to some other tone/noise in the area. I don't know
which. I sure hope there's not a third choice here. Anyway I found Gander
Radio signal at 10051.36kHz, where the USB sounds right to me, which is
supposed to be at 10051.00kHz.

One question before I have to quit playing with this, IF I line up the 500Hz
and 600Hz on spectrogram  at proper place on USB and change to LSB, should
they still be in the right position? I was under the impression they would
be.

John n1sjz

> It makes some sense in that I understand what you are saying, but
> I believe
> it is also causing you some difficulty.  When the K2 is tuned (in LSB or
> USB) to the correct carrier frequency, you should not hear any
> tone from the
> carrier (the carrier should appear at zero hertz - which neither your ears
> nor the K2 audio path can detect).  When you tune WWV so you can
> hear a tone
> produced from the carrier, you are tuned not to 10 MHz, but to 10 MHz +/-
> (audio tone).