Why rectifier is separate

From postmaste–(at)–uffy.demon.co.uk Wed Sep 17 13:47:23 CDT 1997
From: postmaste–(at)–uffy.demon.co.uk (Duncan Munro)
Newsgroups: alt.guitar.amps
Subject: Re: Rectifiers? Confused
Date: Wed, 17 Sep 1997 18:23:18 GMT
Reply-To: postmaste–(at)–uffy.demon.co.uk
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On 17 Sep 1997 07:23:18 GMT, usernam–(at)–hore.net (Your Name) wrote:

> Can one retrofit a tube rectifier to an amp if it does not have a spare 5
>separate filament winding ? Could you use an indirectly heated rectifier
>tube and run it off the normal 6 volt filament suooly ? has anybody done
>this ? would a better method be to use a small separate filament
>transformer to the chasis ? How do they make a dual rectifier setup?

Hi Steve,

Tube rectifiers are not normally run from the 6v filament supply, as
this would put the whole filament supply at B+ potential.

Normal tubes in a guitar amp allow a maximum filament to cathode
potential of 100V to 200V, so this would rule this one out….

Maybe a seperate transformer would be a better idea???

HTH,
Duncan

—
Duncan Munro
Check out http://www.muffy.demon.co.uk/
for Homebrew guitar amps and SPICE models