Re: Tube Data Required

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

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Thanks to all who supplied data or links to data websites. Needless 
to say, I looked around before asking but found only huge lists and 
no substantive data. I asked about the suitability of the 813's from 
the point of view of their being beam tetrodes. The graphite anodes 
are of course the best for taking abuse. I've decided to get hold of 
these and run with them.

Regards,
Malcolm


On 7 Mar 2002, at 12:03, Tesla list wrote:

> Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<evp-at-pacbell-dot-net>
> 
> Tesla list wrote:
> > 
> > Original poster: "Malcolm Watts by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>
> > 
> > Hi all,
> >         Does anyone have, or know where I can get data on the Penta
> > Labs PL-4D21 tube?
> > 
> > Thanks,
> > Malcolm
> 
> 	Try a Google search.  The very first hit I got was at:
> 
> 	www.tube.be/4125a.html
> 
> Give a general description of the tube, pinouts, and general operating
> specs.  Another site gives fmax of 120 MHz, CW power output of 500 w
> max, max plate voltage 3000, screen voltage 400, and maximum plate
> dissipation (commercial use?) of 125 w. Guess they are still being made,
> as several suppliers list them for about one hundred bucks.  Doesn't
> look like a great tube for VTTC, but would work.  I personally would
> never build something like that until I had a good supply of tubes,
> either for replacement if something screwed up, or to build duplicate
> equipment if the project was successful.
> 
> Ed
> 
> 
> 
>