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In Reply to: The voltage doubler circuit! posted by DAK on December 9, 2017 at 07:55:23:
I've recommended voltage doubled 6.3 VAC heater supplies, many times. It works very well for 12AX7 phono preamps. Nothing comes free and only 1/4 of the RMS current is available as DC.
You could use such a supply, with your 7A4s, if you wire the heaters in series.
An advantage of doubling 6.3 VAC is that a low cost 7812 regulator, instead of a low dropout part, is employed. Again, TANSTAAFL strikes and added costs are incurred acquiring the large valued 'lytics that form the doubler stack.
Eli D.
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Follow Ups
- RE: The voltage doubler circuit! - Eli Duttman 16:04:29 12/09/17 (2)
- I can manage the VD part how does the regulator work? - DAK 18:12:14 12/09/17 (1)
- RE: I can manage the VD part how does the regulator work? - Eli Duttman 19:18:09 12/09/17 (0)
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