Re: 810 tubes for sale (and others)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Mddeming-at-aol-dot-com>

In a message dated 3/14/02 10:09:47 PM Eastern Standard Time, tesla-at-pupman-dot-com
writes:



>
> Original poster: "Ed Sawyer by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <sawyer-at-waterville-dot-com>
>
> hi folks -
>
> I've come into a big batch of tubes, including 3 vintage 810s (RCA's, dated
> 1939 and 1943 I think). I did some web searching and these seem to be
> desireable for tesla coils. There's a bunch of other tubes that may be
> applicable too , if anyone has specific requests let me know. I'm open to
> offers on the 810s. I can test for filament continuity but not otherwise
> (my tester doesn't handle jumbo 4-pin base tubes). Being more of an audio
> tube type of guy I don't have a big use for the 810s and many of the
> others. Would be open to possible trades as well. thanks in advance for
> your time and bandwidth.
>
> -Ed Sawyer
> sawyer-at-waterville-dot-com
> Waterville Valley, NH
>
>
>   



Hi Ed,
         810s have some interesting possibilities. 2500 V (ICAS Class-C
oscillator) 750 W max plate input power (175 W dissipation). Heater is
4.5Amp-at-10VDC. Requires no forced cooling. Voltage is a little low for some
VTTCs.
         As a super Audio Amplifier (class B) you can get 400-500W per tube, if
you want to build your own avalanche starter. :-)

Matt D.
G3-1085 

And God Said: Del . Fe=rho(ve)/epsilon;  Del . Fm=0;  Del x Fe + dFm/dt =0;
Del x Fm=mu*J + mu*epsilon*(dFe/dt)  . . . and there was light !