Here is how I cool my rigs.
Parts:
2 each 3 1/4 inch square fans, swap market, 2 bucks each, 12 volt.
1 threaded rod from Home Depot, size 10-24.
6 10-24 nuts, small washers.
4 each 1 inch washers, outside diamater with small hole to fit rod.
2 each wing nuts, 10-24.4 each rubber washers same size as big washeres, Home
made.
I cut the rod about 11 inches long for the xcver. I drilled one of the corner
holes out so the rod would go through the fans. I put a nut and washer on both
sides of the fan and tightened but just snugg. I used the big washers on both
sides of the heat sink on rig with rubber washers against sink so no marking
and ran the rod through the top grove of the sink. I used some heat shrink on
the rod which goes through the sink so no scratching. Tighten the wing nut to
hold the unit on the sink between those large padded washers. This puts the
fans away from the sink maybe four inches or more and it blows the air through
the sink. I do the same on the power supply, that fan is horizontal blowing
down through the supply sink. I put both fans in series as to slow them down
and you get plenty of air with very little noise. The sinks would get very hot
at qrq cw but now just warm. Sorry for such a long book.
Ed K7UC
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