RE: D.C. Filament transformer and choke size.

Tube DIY Asylum

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

In Reply to: D.C. Filament transformer and choke size. posted by TomWh on October 17, 2014 at 11:32:34:

The best solution for a hum-free DHT, IMO, is the Rod Coleman filament regulator. He sells them in various sizes as kits, and they work perfectly to produce a hum-free, very musical DHT circuit. Do a search on DIYAudio for details; pm him over there to order or ask questions - great guy!

I've used them at low current (1A for a 26 preamp) and high current (10A for a 833C power amp), and they work beautifully in both cases. I had to parallel two of them for the 10A filament supply, and even that worked without a hitch. Highly recommended.

Here's a pic of the paralleled regs on a heat sink for my 833C amp, with an LCLC raw supply feeding them through 10ga wire:

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Follow Ups Full Thread

Topic - D.C. Filament transformer and choke size. - TomWh 11:32:34 10/17/14 (5)

RE: D.C. Filament transformer and choke size. - Maxamillion 18:25:16 10/17/14 (0)

RE: D.C. Filament transformer and choke size. - Paul Joppa 12:11:00 10/17/14 (3)

RE: D.C. Filament transformer and choke size. - TomWh 13:28:15 10/17/14 (2)

RE: D.C. Filament transformer and choke size. - Paul Joppa 17:51:50 10/17/14 (1)

Thanks Paul - TomWh 19:22:33 10/17/14 (0)

Follow Ups

RE: D.C. Filament transformer and choke size. - Maxamillion 18:25:16 10/17/14 (0)

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