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At 03:59 PM 4/11/00 -0700, David E Arnold wrote:
>How do you use a Shortwave Radio to check an oscillator frequency?

Tune it in :)

If it says 8.000 MHz, then that's where it should tune in.

First, turn on the VFO, and tune in WWV at 10.0 MHz preferrably, or 5.0, or
anywhere else. (You want it as close to the osc as possible)

Turn on the BFO, and adjust to a low note that you can hear well.
Keep it low, as you can end up on either side of zero. (hard to explain,
but try it, and you'll see)

Now tune in the osc, and you should hear the same low note if the osc is in
tune.
What you'll probably hear is a higher note, indicating that it's a little off.
Adjust the osc till it's the same as WWV, without moving the BFO.

You can also tune in the third harmonic and check for radiation.
It's hard to judge without some similar device to get levels from, but with
a little experience, you can tell how much noise you are radiating.

I use an Icom R-8500 for this sort of EMI testing, it covers 0.1 MHz to
1999.999 MHz continuously.

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