Re: Vacuum Tubes

• To: tesla-at-pupman-dot-com
• Subject: Re: Vacuum Tubes
• From: "Stephen G. Stanton" <ulflyer-at-i-cafe-dot-net> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Sat, 17 Oct 1998 18:35:28 -0600
• Approved: terryf-at-verinet-dot-com

Reinhard,

The 304TL is a strange animal, filament-wise.  There are actually two
filaments in each tube.  These filaments are five volt filaments.  You can
hook the two sets up in parallel, and the tube will draw 5 v at 25 amps. 
You can also hook them up in series, and use a 10 v 12.5 amp transformer. 
Those are usually more available than the 5 v 25 amp variety.

I'm not quarreling with your logic:  it's the peculiar nature of the dual
filaments in the 304 that is the problem.

Stephen KJ6LH

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