RE: 12.6VAC heater power supply

Tube DIY Asylum

Do It Yourself (DIY) paradise for tube and SET project builders.

In Reply to: 12.6VAC heater power supply posted by howardyu on May 8, 2015 at 02:18:39:

I would not recommend it. There can be subtle variations in heater current draw from one tube to another, in which case one might get 7V and the other 5V.

If you do, though, be sure the tubes are the same brand.

That being said, I know of one guitar amp manufacturer who is running four EL84's in series across a 25V supply.

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Follow Ups Full Thread

Topic - 12.6VAC heater power supply - howardyu 02:18:39 05/08/15 (4)

RE: 12.6VAC heater power supply - howardyu 23:50:03 05/08/15 (0)

RE: 12.6VAC heater power supply - Alpha Al 05:04:11 05/08/15 (2)

Equal voltage or equal current? - Triode_Kingdom 08:57:07 05/08/15 (1)

RE: Equal voltage or equal current? - Caucasian Blackplate 09:08:11 05/08/15 (0)

Follow Ups

RE: 12.6VAC heater power supply - Alpha Al 05:04:11 05/08/15 (2)

Equal voltage or equal current? - Triode_Kingdom 08:57:07 05/08/15 (1)

RE: Equal voltage or equal current? - Caucasian Blackplate 09:08:11 05/08/15 (0)

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