In Reply to: DC Heater PSU Schematic, etc. posted by Eli Duttman on December 12, 2014 at 19:13:45:
This doubler should work well to supply the regulator. If I recall, the similar setup I used in the RCA hybrid MOSFET follow circuit provides about 14VDC and regulates to 12VDC well. The 12AX7s don't pull much current for their heaters.
Use a heat sink on the 7812 -- it gets warm.
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Follow Ups
- RE: DC Heater PSU Schematic, etc. - jyourison 19:47:24 12/12/14 (0)