In Reply to: RE: Standby switch...pros and cons? posted by hennfarm on August 19, 2016 at 11:37:45:
The NTC inrush limiting thermistor delays B+ rise for a few seconds. Those few seconds are enough, when an "instant on", SS rectified, bias supply is employed.
The 1st cap. can't charge up very quickly, working through the thermistor's cold resistance. Ohm's Law tells us that the charging current is limited.
Eli D.
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Follow Ups
- RE: Standby switch...pros and cons? - Eli Duttman 13:25:09 08/19/16 (2)
- RE: Standby switch...pros and cons? - hennfarm 19:21:36 08/19/16 (1)
- RE: Standby switch...pros and cons? - Jim McShane 09:34:37 08/20/16 (0)