Gary
Unless you use a center tap pos / pos scheme you will pull more electrons
off one side of cathode than other and you may introduce hum, assuming
directly heated cathode type tube.
Also you are wanting a low voltage probably high current regulator with it's
large heat sink.
AC regulators with a triac to adjust and regulate the transformer primary
aren't that difficult to do.
Paul K0UYA
----- Original Message -----
From: "Gary Hinson" <Gary@isect.com>
To: <amps@contesting.com>
Sent: Friday, January 23, 2009 4:23 PM
Subject: [Amps] Dumb question #37b - DC filament
>
> Hi all.
>
> I'm contemplating how best to regulate the filament voltages on my amps,
> and
> curious as to whether it's possible/sensible to use a regulated DC supply
> instead of the usual AC. Regulating DC is "easy". It's just a heater,
> right? If there is a blindingly obvious reason why I shouldn't, then fine
> go ahead and blind me.
>
> 73
> Gary ZL2iFB
>
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