Re: First VTTC light, and a few questions

["Gomez ADDams" <gomez-at-netherworld-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

on that fateful day 7/26/00 12:41 PM, Tesla list uttered:

> Original poster: Parpp807-at-aol-dot-com

Ralph Zekelman said:

> The 811 is a medium powered Class A amplifier intended for use as an audio
> frequency
> amplifier. Running the tube with visibly red plates must exceed the plate
> dissipation
> rating of the tube and also produce considerable secondary emission.

Not so, at least for the 811A.  I had an RCA version of the 811A in a VTTC
in high school, and I had the documentation for it, straight from RCA, which
claimed that when running at its full rated power of (I think) 400watts CW
Class A, the plate would glow red and that this was normal.  Also a dim
purple glow around the plate at lower power ratings and higher voltages
could be expected.

- "Gomez ADDams" aka Bill Lemieux

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