In Reply to: Can someone explain why a thermistor is used in an amp's power supply? posted by Norm on March 18, 2012 at 10:05:17:
have a resistance rating and a current rating, IIRC. The idea is that the thermister slows the current inrush just enough to avoid damaging things like the capacitors or the tube heater elements. Too large a resistance and the additional strain on the device can cause it to blow.
Stu
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Follow Ups
- Thermisters - unclestu 16:00:12 03/19/12 (3)
- Interesting as the new thermistors that seem to have corrected the problem have lower resistance at room temp* - Norm 17:09:34 03/20/12 (2)
- RE: Interesting as the new thermistors that seem to have corrected the problem have lower resistance at room temp* - unclestu 12:36:24 03/23/12 (0)
- I might add that this means less protection. - Norm 17:14:37 03/20/12 (0)