I'm not sure what is gained by checking REF CAL against /all /WWV
frequencies. The manual suggests using the highest frequency on which
WWV can be copied ... 10 or 15 MHz (10,000 watts), or (better) 20 MHz
(2500 watts) if propagation is right.
Performing the REF CAL calibration against WWV's main carrier is quick
and easy but requires a quiet room and good ears. Drake alumni are used
to the procedure having had to flat-line the "chirps" when zero-beating
receiver against transmitter, especially on SSB signals. As a reminder
for newer ops, the transceiver should be on for at least 15 minutes
(according to the manual) before doing the calibration. I personally
wait 30 minutes or more, depending on room temperature.
One night, a few days after FD, another K3 owner told me I was a couple
hundred cycles off our net frequency (CW). Having just gotten the rig
back from Elecraft for updates (s.n. 21), I replied, "on your end, pal,
can't be on mine". I then checked for myself and discovered I was
indeed several hundred cycles off WWV. Since then, I check it every few
months. Components do age, you know. Especially 12 year-old ones.
73,
Kent K9ZTV
On 2/22/2019 9:01 AM, someone wrote:
The method I've used to check my K3S, put the radio in CW mode, tune
to each WWV frequency and then press SPOT. The automatic SPOT
function will bring the radio to the WWV frequency +/- 1 Hz. The SPOT
function matches the receiver sidetone offset of the WWV carrier and
the audio of WWV is not applicable. If the display is other than
the WWV frequency, then adjust the REF CAL number to correct the
error. You do need to check all of the WWV frequencies you can
receive to assure the accuracy holds on all bands.
Unfortunately we have come to believe that the digital readouts are
absolute, which indeed, they are not. They depend on the internal
reference. If the internal reference is incorrect, then everything
else is likewise incorrect.
---
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