Tubes

• To: "'Tesla List'" <tesla-at-pupman-dot-com>
• Subject: Tubes
• From: Tesla List <tesla-at-stic-dot-net>
• Date: Sat, 18 Apr 1998 07:29:35 -0500
• Approved: tesla-at-stic-dot-net

----------
From:  Edward V. Phillips [SMTP:ed-at-alumni.caltech.edu]
Sent:  Friday, April 17, 1998 2:18 PM
To:  tesla-at-pupman-dot-com
Subject:  Re:  Tubes

"        Basically the VT-4-C is the same as the 203A, a triode
rated for 50 watts nominal plate dissipation.  Filament is 10 volts
at 3.25 amps, as I recall.  Can look it up later.  These tubes
should work pretty well for a low-power coil, provided they haven't
turned too gassy after all of these years; they are over 50 years
old and could be as much as 60+

Ed"

	I stand corrected by several people.  The VT-4-C is indeed
the equivalent of the 211.  The amplification factor is 12, instead
of the 25 for the 203A.  Basically interchangeable and will work
just fine as mentioned before.

Ed

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