Re: Vacuum Tube coils..
I'm in a similar position, brewing up my first VTTC, though I already
purchased a single 811A for the purpose. A word of warning, that 5V
supply should ONLY be used for tubes with 5V filaments. This goes
especially for thoriated filaments rated higher than that. It will leave
you with a low or non-emission filament, essentially a dead tube.
Here are a large amount of smaller triodes I have specs on, roughly
arranged in increasing plate current capability. Mind you, while triodes
are what are most aften used in VTTC service, there are many tetrodes and
pentodes (803s come to mind) that would also be suitable. If you find a
great price on an unfamiliar tube, just make sure it has a really big
plate, preferrably graphite.(?)
That covers a range of 30 watts dissipation (809, 1623) to 250 watts
dissipation (3-250A4, 250TH, 3-250A2, 250TL)
Any of them should work.
Hope this helps ;)
On Tue, 16 Nov 1999 21:37:56 -0700 Tesla List <tesla-at-pupman-dot-com> writes:
> Original Poster: "Coiler" <mycroft-at-access1-dot-net>
> I admit ignorance here, but I'm thinking of making an attempt at a
> VTTC -
> finally got a collection of decent MOT transformers, and I have a 5V
> lying around - should run those filiments just fine :).
> Anyway, If someone could send me a list of usable tubes for a VTTC
> it - That way I can start hunting the flea markets, etc.
> [Do list any caveat and/or all tubes you can think of that would
> Michael Baumann
> Coiler, Homebrewer, Nerd...mycroft-at-access1-dot-net
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