[Elecraft] K2 Frequency Alignment

Sun Jul 27 21:48:02 2003

Don, that was an oversight on my part: the intended frequency is 440 Hz, not
400 Hz, since WWV transmits only 440 Hz and then only for one minute (#2) of
each hour. Sorry about letting that slip by.

I should also note that since the K2 has no AM mode, that this procedure is
difficult if not impossible to use since the dial calibration as well as
soundcard frequency error will both affect the results.

The procedure is excellent for radios with AM mode but of limited use with
the K2.

73/72, George
Amateur Radio W5YR -  the Yellow Rose of Texas
Fairview, TX 30 mi NE of Dallas in Collin county EM13QE
"In the 57th year and it just keeps getting better!"
<mailto:[email protected]>

----- Original Message -----
From: "Don Wilhelm" <[email protected]>
To: "George, W5YR" <[email protected]>; <[email protected]>; "'Rich Lentz'"
<[email protected]>; "'Elecraft Reflector'" <[email protected]>
Sent: Sunday, July 27, 2003 12:31 PM
Subject: Re: [Elecraft] K2 Frequency Alignment

> George,
>
> I hope I inferred something that you did not mean in your reference to 400
> Hz when calibrating your PRO2 - the tones that WWV transmit are 500 or 600
> Hz depending on which minute - 440 Hz is transmitted at 2 minutes past the
> hour.  What means 'deviation from 400 Hz'???
>
> For anyone needing the WWV schedule format, look at:
> http://www.boulder.nist.gov/timefreq/stations/iform.html - it will tell
you
> what the audio tones are supposed to be when you look at them on
Spectrogram
> or Digipan or something else.
>
> 73,
> Don W3FPR
>
>
> ----- Original Message -----
>
> | I previously calibrate the PRO2 with WWV by first measuring the WWV
audio
> | tone in AM mode to verify the soundcard/program operation. Any deviation
> | from  400 Hz or whatever is noted as a correction factor. Then I tune to
> WWV
> | at 10.001 MHz and look at the 1000 Hz trace. Any departure from exactly
> 1000
> | Hz +/- the soundcard factor is the dial calibration error of the PRO2
> which
> | is then factored into the 4 MHz calibration. I usually keep the PRO2 to
> | within 0.5 Hz of WWV as measured in this manner.
> |
> |
>
>
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