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RE: Resistor dissipation Question

Power equals Voltage times Current (in Amperes), Ohm's Law.

I always make sure there is 2 to 1, rated versus dissipated, and I am MOST HAPPY when it is 4 to 1, rated versus dissipated, for long term reliability and fail-safe operation.

I ventilate my chassis on DIY builds, above and below power resistor bodies that dissipate a lot. I drill 3/8ths inch vent holes on 9/16ths inch centers, three in a row, for Mills MR-12 power resistors, looks "uptown".

Jeff Medwin


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