Calibration using WWV and a Smartphone

[Robert Glorioso]

Here is how I do it.

1. Load a Music tuning app that also reports frequency in Hx on your smartphone.  “PANO TUNER” on the iPhone is Free,  (Not a type, PANO is correct.)
2. Tune in WWV on AM on 5, 10, or 15 MHz.
3. Calibrate the iPhone tuner using 440, 500 or 660 HZ tone that WWV transmits at different times for a few minutes by noting the frequency difference.  Mine was well within 1Hz.  The tone schedule is on the WWV website.
4. Set the rig to USB and move the carrier until you read 440, 500 or 600Hz lower on your dial,
5. Read the frequency on your smartphone and then recalibrate the rig to read 440, 500 or 600 Hz.
6. You’re now calibrated to within at least 1Hz of the right frequency.

73,
Bob
W1IS



Message: 1
Date: Fri, 16 Dec 2016 20:12:17 -0500
From: [hidden email] <mailto:[hidden email]>
To: [hidden email] <mailto:[hidden email]>
Subject: [Elecraft] Sync AM and checking VFO accuracy using WWV
Message-ID: <[hidden email] <mailto:[hidden email]>>
Content-Type: text/plain; charset="US-ASCII"

If I set my K3's VFO to WWV at 5.000000 MHz with AM-S on....and I adjust  
"REF CAL" to a number where
my VFO's frequency readout is exact or near this number +/- maybe a Hertz  
or two. Is this an accurate way to calibrate my K3?

It seems to be very accurate as far as I can tell.

Has anyone used this method?

Michael
N2ZDB
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[Don Wilhelm]

All,

That is a good method.

If you wish to use a computer rather than a smartphone (some of us only
have 'dumb' phones), you can feed the radio audio into a soundcard and
use an audio spectrum analyzer like Spectrogram or Spectrum Lab.
With the audio spectrum analyzer, you do not have to go through the
calibration process if your soundcard/computer produces accurate
measurements.  Go directly to SSB and you can see the pitch of the tones
on the display.

You can download a clean copy of Spectrogram from my website
www.w3fpr.com - look for the link near the bottom of the opening page.
The link is to a local file on my website and has been scrubbed many
time for virus.  I have heard that copies of Spectrogram at other web
locations have contained viruses.

73,
Don W3FPR

On 12/17/2016 4:37 PM, Robert Glorioso wrote:

> Here is how I do it.
>
> 1. Load a Music tuning app that also reports frequency in Hx on your smartphone.  “PANO TUNER” on the iPhone is Free,  (Not a type, PANO is correct.)
> 2. Tune in WWV on AM on 5, 10, or 15 MHz.
> 3. Calibrate the iPhone tuner using 440, 500 or 660 HZ tone that WWV transmits at different times for a few minutes by noting the frequency difference.  Mine was well within 1Hz.  The tone schedule is on the WWV website.
> 4. Set the rig to USB and move the carrier until you read 440, 500 or 600Hz lower on your dial,
> 5. Read the frequency on your smartphone and then recalibrate the rig to read 440, 500 or 600 Hz.
> 6. You’re now calibrated to within at least 1Hz of the right frequency.
>
> 73,
> Bob
> W1IS
>
>
>
> Message: 1
> Date: Fri, 16 Dec 2016 20:12:17 -0500
> From: [hidden email] <mailto:[hidden email]>
> To: [hidden email] <mailto:[hidden email]>
> Subject: [Elecraft] Sync AM and checking VFO accuracy using WWV
> Message-ID: <[hidden email] <mailto:[hidden email]>>
> Content-Type: text/plain; charset="US-ASCII"
>
> If I set my K3's VFO to WWV at 5.000000 MHz with AM-S on....and I adjust
> "REF CAL" to a number where
> my VFO's frequency readout is exact or near this number +/- maybe a Hertz
> or two. Is this an accurate way to calibrate my K3?
>
> It seems to be very accurate as far as I can tell.
>
> Has anyone used this method?
>
> Michael
> N2ZDB
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]