There is one very simple solution to greatly improve the stability of
any VFO: blowing air over the equipment case. It's not obvious, but
by keeping the case cool, you keep air inside the case close to
ambient temperature. The stability gain can be incredible--around
an order of magnitude. I like to think it also reduces the chance of
component failure due to to heat.
You can place the fan on a stand behind or next to the transceiver to
blow over the top. I place the fan right on the top, horizontally,
raised with spacers in each of the fan's mounting holes. (No holes
in the case--just gravity holding the fan.) I drop the voltage to
the fan to about 50% to 75% to keep it quiet.
I've not tried this with a K1, but it sure works with other
transceivers.
73
Dick, K0KK
On Dec 19, 2005, at 4:31 PM, Mike Morrow wrote:
But returning back to the original question, I'd say that if anyone
finds something simple that improves the already excellent
stability of the K1 VFO, I'd certainly be interested in hearing
about it. Happy experimenting!
73,
Mike / KK5F
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