Re: tubes

• To: tesla-at-pupman-dot-com
• Subject: Re: tubes
• From: "Ed Phillips" <evp-at-pacbell-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Sat, 04 Mar 2000 17:08:41 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Tesla List wrote:
> 
> Original Poster: "Area31 Research Facility" <rwstephens-at-hurontario-dot-net>
> 
> Jason,
> 
> Try to find an 810 triode (175 watt) or use a single or pair of paralleled
> 805 (~100 watt) triodes. Their plate voltage rating is just right for a
> straight MOT without voltage doubler.  Stay away from 811A, too marginal
> and easily melted here.  872B would be a good one singly or paralleled as
> well.  I had an enormous amount of fun using a single 810 in a coil I built
> in electronics class at hi-school.
> 

	There were an almost infinite number of UV203A and VT4-C triodes
available surplus after WW2, and there are probably a lot still kicking
around somewhere.  Nominal 50 watt dissipation, filament 3.25 amps at 10
volts.  I suspect two or more in parallel would give quite respectable
performance.

Ed

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