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R7000.5
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1991-03-10
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R7000.5
ADD A COOLING FAN TO YOUR ICOM R-7000 RECEIVER
by Brian Kantor, WB6CYT1
In my R-7000, adding a fan makes a big difference.
I've had it on continuously for three days now, and
it's still nice and cool. Turns out most of the heat
comes from the transformer core in the AC supply. One
of those 3-1/2" 12V DC fans fits just nicely - a pair
of 1/4" standoffs screwed through two of the upper back
panel ventilation slots holds it in place, the power
leads snake through the lower ventilation slots, and
some duct tape to form a gasket, and it pulls the hot
air right out. If you pick the 12V off the power sup-
ply regulator board at W3 (orange lead), it will even
work properly when you run the radio off 12 volts.
[In order to blow hot air out, the fan must suck in
cool air from somewhere. Users are advised to be on
guard for dust being drawn into fan-equipped R-7000s. -
Editor]