In Reply to: SMPS for Filaments posted by Triode_Kingdom on May 10, 2017 at 10:26:24:
I did it alnmost 10 years ago in this OTL.
The switching (12.6 V) power supply of heaters had 'output current protection', so that it also ensures soft start of heaters.
At power on there is some buzz coming from the heaters supply for a few seconds (a clear indication of current limiting operation).
Since then no problem at all.
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Follow Ups
- RE: SMPS for Filaments - 6AS7_6SN7 02:24:48 05/11/17 (1)
- RE: SMPS for Filaments - addendum - 6AS7_6SN7 02:32:26 05/11/17 (0)