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R: Vacuum Tube Database; looking for 811A coil design
Original poster: "vladimiro mazzilli" <vladmiro.mazzilli@xxxxxxxxxx>
Terry put a Vintage plan using 2X811 tubes in a VTTC built by Harold
Strand in 1962 the link is
Da: Tesla list [mailto:tesla@xxxxxxxxxx]
Inviato: martedì 5 dicembre 2006 5.48
Oggetto: Re: Vacuum Tube Database; looking for 811A coil design
Original poster: <chipford@xxxxxxxxxxxx>
Hi you-all. I would like to mention again that I work at
kurz-kasch...One of the worlds oldest plastics manufacturing plants
in the world..We been getin-r-done since 1916. We still manufacture
some tube sockets and have others in stock..I am no expert on what
fits what tube but, with a little help, I might be able to dig a tube
socket or 2 up.....let me know...Chip
---- Tesla list <tesla@xxxxxxxxxx> wrote:
> Original poster: FutureT@xxxxxxx
> In a message dated 12/4/06 5:10:53 PM Eastern Standard Time,
> tesla@xxxxxxxxxx writes:
> >So .. anyone know where to find said tubes, plate connectors,
> >sockets, and VTTC schematics these days? Are 811A's even a good tube
> >to work with? I've seen other tubes discussed here..
> > -- many thanks,
> > David Small
> The 811A's are OK if you are aiming for relatively short sparks.
> But for serious sparks, it's a good idea to use more powerful tubes.
> I often use the 833A or 833C tubes. The "C" tube has a graphite
> plate for greater power handling. There are a number of tubes
> that work well in VTTC's. I've used the 810, 845, 4-125A,
> 4-250A, 4-400, HF300, 5868, 803, 813,etc. The 4-1000A, and 3-500Z,
> and 3-1000Z are good tubes too. Basically look for a high power,
> high voltage triode. Tetrodes and pentodes work too but may not
> be quite as reliable. The tubes can be placed in parallel if they
> are of the same type for greater power handling. Use staccato
> for special effects and longer sparks.
> click on VTTC's, various pages and projects.