RE: Will this work? Switching from 6.3 to 12.6 volts

Put resistors in series with the SS diodes to make them resemble the 6X4. That will allow for safe listening, until the new tubes arrive.

"Ok, so, if the winding could supply 1 amp of 6.3vac , using a voltage doubler on it would only supply .25A?"

You could get a bit more, but 25% is the safe "guesstimate". Also, keep in mind that, less losses, doubling 6.3 VAC yields 17.8 VDC. The losses include the forward drop of both diodes. Schottkys exhibit an approx. 0.5 V. forward drop and are switching noise free. IMO, that's 2 good reasons to favor them. My guess for doubled 6.3 VAC, via Schottky's, is 16.4 VDC.

FWIW, I like doubling a 6.3 VAC winding of adequate capability with 2X Schottky diodes and regulating with a 7812 IC, for 12AX7 phono preamps. A high performance, modest budget, PSU for RCA setups, tweaked or original, can be built around Allied's 6K1VF power trafo. Tie the rectifier winding's CT off and bridge rectify the end to end voltage. Voltage double and regulate the filament winding. While the 1 A. filament winding is a bit undersized for this job, the heat generated (a critical factor) is compensated for by the lightly loaded rectifier winding. Contact "inmate" Jeff Yourison for more details.

Eli D.

Allied 6K1VF Data Sheet (Open in New Window)

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Follow Ups Full Thread

Topic - Will this work? Switching from 6.3 to 12.6 volts - DAK 16:52:21 06/11/17 (20)

RE: Will this work? Switching from 6.3 to 12.6 volts - Eli Duttman 00:01:16 06/12/17 (5)

Doesn't the Dynaco PAS use a voltage doubler for rectifying the filaments? - DAK 12:00:41 06/12/17 (2)

RE: Doesn't the Dynaco PAS use a voltage doubler for rectifying the filaments? - Eli Duttman 16:32:10 06/12/17 (1)

RE: Doesn't the Dynaco PAS use a voltage doubler for rectifying the filaments? - DAK 16:52:27 06/12/17 (0)

RE: Will this work? Switching from 6.3 to 12.6 volts - DAK 02:26:56 06/12/17 (1)

RE: Will this work? Switching from 6.3 to 12.6 volts - Eli Duttman 03:52:23 06/12/17 (0)

RE: Will this work? Switching from 6.3 to 12.6 volts - Triode_Kingdom 23:21:30 06/11/17 (5)

Sorry, i was mistaken about the single 6.3vac tap - DAK 02:34:30 06/12/17 (4)

Not according to the Eico schematic - Triode_Kingdom 11:11:51 06/12/17 (3)

RE: Not according to the Eico schematic - DAK 11:49:35 06/12/17 (2)

RE: Not according to the Eico schematic - Triode_Kingdom 13:10:47 06/12/17 (1)

RE: Not according to the Eico schematic - DAK 14:55:00 06/12/17 (0)

Voltage doubler circuits - FenderLover 19:21:16 06/11/17 (7)

RE: Voltage doubler circuits - DAK 02:31:04 06/12/17 (5)

If you already have 12.6 VDC.. - FenderLover 07:20:24 06/12/17 (4)

RE:I am trying to get 12.6v - DAK 09:32:16 06/12/17 (3)

RE:I am trying to get 12.6v - FenderLover 18:12:20 06/12/17 (2)

RE:I am trying to get 12.6v - DAK 18:17:45 06/12/17 (1)

Yeah, 12.6VAC transformer is prolly best solution. (n/t) - FenderLover 20:03:05 06/12/17 (0)

RE: Voltage doubler circuits - Eli Duttman 00:07:21 06/12/17 (0)

Follow Ups

RE: Will this work? Switching from 6.3 to 12.6 volts - Eli Duttman 03:52:23 06/12/17 (0)

RE: Will this work? Switching from 6.3 to 12.6 volts

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