[Elecraft] ARRL FMT April 13 - 0215utc (K3EXREF)

[Tony Estep]

On Fri, Apr 8, 2011 at 2:24 AM, Edward R. Cole <kl7uw at acsalaska.net> wrote:

> Might be a great way to demonstrate the new accuracy of the K3EXREF!
> http://www.arrl.org/frequency-measuring-test
>
> Any tips on how one measures the frequency in these tests?
>
> Well, one way to do it is described in the docs for WSPR 2.0:

http://www.physics.princeton.edu/pulsar/K1JT/WSPR_2.0_User.pdf

<http://www.physics.princeton.edu/pulsar/K1JT/WSPR_2.0_User.pdf>
You can calibrate your rx within 1 hz using the technique desribed in the
manual, then just read the test frequency off your dial. Several WSPR users
were among the top finishers in the last test using this technique.

When you first read it, it sounds harder than it is. You just calibrate at
several different reference frequencies, then generate a correction function
for dial error vs. frequency. If you like this sort of stuff, check it out.

Tony KT0NY