At 4/29/2005 02:07 PM, you wrote:
>Aren't most refrigerators kept ABOVE freezing? That would
>still be in the range before the compensation kicks in.
Only the hot & cold end compensation (beyond where the crystal's
temperature coefficient inverts). That compensation is accomplished using
a temperature-dependent voltage generated by a 2C or 5C Icom (for Mastr
IIs) or a comp. circuit on the exciter board (Exec II & MVP) & varactors in
the ICOMs/xtal modules. There is also mid-range compensation, which is
done with temperature-compensating capacitors only (compensation line
voltage doesn't change). I believe ICM & Bomar only change these mid-range
capacitors.
Since my sites almost never get below freezing or above 134 �F, I don't
worry about the hot & cold end comp.
Bob NO6B
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