Re: Identifying correct resistor value for CS80 power transistor
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The big ceramic resistors are current-limiters for the outputs.
The ¡À15 rails on the CS-80 each pull about 2.5 amps in normal operation. If you had an accidental direct short to ground, this resistor limits the current draw on the output transistors to 15 amps as opposed to a runaway condition if they weren't there. So, they're a safety device for the power supply.?
I recently replaced a couple in a customer's power supply?and used the Yageo?SQP500JB-1R part from Mouser. It's a J tolerance which is 5%. Maintain a little air gap between the resistor and big heat sink to help keep things cool.
Scott
Thank you Joan, interesting! Yes it would be great if you could double check that, in case nobody else confirms this.Thanks!
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