Re: Big Daddy Vacuum Tube

To: tesla-at-pupman-dot-com
Subject: Re: Big Daddy Vacuum Tube
From: Bert Hickman <bert.hickman-at-aquila-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Tue, 24 Aug 1999 04:55:05 -0600
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Tesla List wrote:
> 
> Original Poster: "christopher boden" <chrisboden-at-hotmail-dot-com>
> 
> I have a giant 4-1000-A Tube, with 5 bottom pins and a nipple....
> 
> Is it usefull for anything?
> How do I apply power to it just to make it glow (for pretty, not for
> funtion)?
> 
> The Coronaphile
> Christopher A. Boden
> The Geek Group
> 
> The Geek Shall Inherit the Earth!
> 
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Christopher,

The tube is a large tetrode that can handle 1000 Watts of plate
dissipation (3000-4000 Watts or so for pulsed/half-wave rectified Tesla
Coil use :^)). 

The filament is rated for 7.5 volts at 21 amperes(!), and with proper
biasing of the screen grid, it should be possible to make a very nice,
high power, vacuum tube Tesla Coil using this tube. Because of the more
complex biasing and power levels, it's probably not the best tube to use
for your first vacuum tube coil, however...

-- Bert --