Quote:
Originally Posted by joe111671
There are two types of thermistors. NTC and PTC. NTC means the resistance drops as it heats up, and PTC means the resistance increases as it heats up. So in my case, I need NTC since the degausser is in parallel with the thermistor, where I would need PTC if it was in series. I need a 120 ohm, but Mouser doesn't have it. They do have a 130 ohm, so I'll try that. It's only a buck, so if it doesn't work right, I'll jump it out again and go looking for a 120 ohm.
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Some sets have both PTC and NTC...RCA around the CTC16 would put the degauss in series with the B+ winding of the power transformer...they would put a PTC in series with the degauss and an NTC in parallel with the degauss and PTC to bypass them as the PTC got close to open circuit.