K2 4 MHz Osc Calibration with RWM Moscow [C1]

[Colin BUTCHER]

Good morning all.

Not being able to receive WWV here in London, England, and not having an
equivalent domestic service ourselves any more, I have been looking around
for a signal against which to calibrate the 4 MHz oscillator. RWM (Moscow)
may be suitable in that they transmit time info., on 4996, 9996 and 14996
KHz and I can receive them hear loud and clear.

But I wish to check my logic as their signal is A1X at 1000 Hz so there is
no carrier or voice against which to tune. Can I do the following ?

Set K2 to LSB (i.e. not CW in order to remove the CW offset)
Set SPOT (STP) tone to 1KHz
Zero beat with SPOT tone against RWM signal and then proceed with the N6KR
method for setting the 4MHz oscillator (by setting the difference between
the BFO and VFO to exactly 9996 with C22)

Comments gratefully received.

Many thanks

Colin
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[Don Wilhelm-4]

Colin,

While that may work, I have never done it that way and cannot say.
I would choose one of two alternate methods.
1) Use Spectrogram to determine that you are receiving a tone at exactly
1000 Hz, then proceed with the N6KR method.
2) Tune the signal on another AM receiver - the tone you hear will be
the modulating tone and you can zero-beat the signal received on the K2
to that tone.

73,
Don W3FPR

Colin BUTCHER wrote:

> Good morning all.
>
> Not being able to receive WWV here in London, England, and not having an
> equivalent domestic service ourselves any more, I have been looking around
> for a signal against which to calibrate the 4 MHz oscillator. RWM (Moscow)
> may be suitable in that they transmit time info., on 4996, 9996 and 14996
> KHz and I can receive them hear loud and clear.
>
> But I wish to check my logic as their signal is A1X at 1000 Hz so there is
> no carrier or voice against which to tune. Can I do the following ?
>
> Set K2 to LSB (i.e. not CW in order to remove the CW offset)
> Set SPOT (STP) tone to 1KHz
> Zero beat with SPOT tone against RWM signal and then proceed with the N6KR
> method for setting the 4MHz oscillator (by setting the difference between
> the BFO and VFO to exactly 9996 with C22)
>
> Comments gratefully received.
>
>  

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