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Re: Tube Coils (fwd)
---------- Forwarded message ----------
Date: Mon, 24 Feb 1997 01:02:56 -0800
From: Open Minded <unknown-at-apc-dot-net>
To: Tesla List <mod1-at-pupman-dot-com>
Subject: Re: Tube Coils (fwd)
Tesla List wrote:
>
> ---------- Forwarded message ----------
> Date: Mon, 24 Feb 1997 12:58:34 +1200
> From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
> To: tesla-at-pupman-dot-com
> Subject: Re: Tube Coils (fwd)
>
> Hi Brent,
> Thanks for this....
>
> <snip>
> > My vacuum-tube driven coil uses a pair of 805's, and runs great with
> > hot, flaming 6-8" discharges. Got some pic's of it on the funet server:
> >
> > http://www.funet.fi/pub/sci/electrical/tesla/pictures/turner
> >
> > - Brent
>
> What plate supply voltage are you using? I see from data the tubes
> are not rated for much more than 1 kV or so, but that could change
> if plate current is kept down somewhat. In tube amps I have dealt
> with, I have noticed that the ones running the tubes like this tend
> to burn 'em out quicker (low emission - stripped cathodes perhaps).
>
> Malcolm
Malcolm -
The 805's are rated at 1500 plate, 210mA max plate current. I'm
pumping about 1300 on the plate at the max plate current. Considering
that the toobz run for maybe 10 minutes at a stretch, oh, 3-4 times
a year, I figure that they outa last for a while, at least... ;-)