Re: OLD Tubes/Coils - filament power (fwd)

• To: tesla-at-pupman-dot-com
• Subject: Re: OLD Tubes/Coils - filament power (fwd)
• From: Tesla List <mod1-at-pupman-dot-com>
• Date: Mon, 3 Mar 1997 21:35:38 -0700 (MST)
• Approved: mod1-at-poodle.pupman-dot-com

---------- Forwarded message ----------
Date: Mon, 3 Mar 1997 17:14:28 -0800 (PST)
From: "Edward V. Phillips" <ed-at-alumni.caltech.edu>
To: tesla-at-pupman-dot-com
Subject: Re: OLD Tubes/Coils - filament power  (fwd)

	The 803 DOES have a thoriated tungsten filament, and if
I were you I'd err on the side of having somewhat higher than
rated filament voltage (say at least 10.1 to 10.25 volts at the
socket pinks).  Rated current is 5 amps.  The 803 is an ancient
tube, and there must be better ones, but if you have it use it.
Full filament voltage is most important if you are running
high emission.
Ed

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