Re: My VTTC fun begins...

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Steve Ward" <steve.ward@xxxxxxxxx>

Glad to see you now have the ball rolling along on the tube coil
project.  You have a nice collection of tubes to work with.  I suggest
using the 833 over the 813 and 304 since the 813 is a tetrode (or
pentode?) and the 304 is very fragile from my experience (but quite a
work-horse for its size!).  Feel free to direct any questions at me if
there is anything in particular.

Im still waiting to build something with the 833Cs that i have, but i
just cant seem to find the time (ive been saying this for years it
seems).

Steve

On 1/18/07, Tesla list <tesla@xxxxxxxxxx> wrote:
> Original poster: Brett Miller <brmtesla2@xxxxxxxxx>
>
> Dan, John Freau, Steve Ward and VTTC fans,
>
> I have uploaded some pics to my hot-streamer site
> which document some preliminary tube testing I've been
> doing.
>
> Here's my test of the filament of the 813 I got from
> Dan Williams.  It was powered (through a variac) using
> the same Zebra MOT which I rewound for the 833
> filament.  It works great for either one, and also for
> my 304TL:
>
> http://www.hot-streamer.com/brett/misc/813_fil_test1.jpg
>
> Tonight I also checked the filaments on my 833A's:
>
> http://www.hot-streamer.com/brett/misc/833lit1.jpg
> http://www.hot-streamer.com/brett/misc/833va.jpg
>
> Now all I need to do is wait for my doorknobs to
> arrive in the mail, and get my hands on a 5k 100w (or
> thereabouts) resistor for grid leak.  After than I'll
> finish fabricating the hardwood base and wire
> everything up.  Here is a picture showing some of the
> parts I have assembled, including the extremely classy
> toroid I purchased from Mr. Freau several years ago.
> Extra large MOT made by Advance Transformer Co., a
> huge MOT diode for the doubler and the usual pair of
> can caps.   RL network to suppress parasitic
> oscillations on the plate, and of course, the primary
> form which still has needs a primary and grid coil
> wound onto it.  This is very exciting, even though I
> am probably a week or two from first light, maybe
> more.
>
> http://www.hot-streamer.com/brett/misc/brett_vttc_overview.jpg
>
> This would not be possible without the excellent work
> of John Freau and Steve Ward, plus many others.  The
> VTTC FAQ is an excellent document from which I have
> learned an immense amount...what an excellent
> resource.   I will keep everyone posted.  Maybe I can
> eventually inspire others to do more VTTC work.  I
> know it has been discussed at length on the list over
> the years, but I always felt it didn't really get its
> fair share.  Maybe we can change that.
>
> -Brett
>
>
>
>
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