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Re: [TCML] yet another 833c vttc with problems
Well I followed Steve Ward's 833a coil almost exactly. This is my 1st tube
coil and I really know almost nothing about them. I've tried 22 -30 primary
turns with no spark at all.
On Tue, Sep 16, 2008 at 12:43 PM, Bud <bud@xxxxxxxxxxxx> wrote:
> Hi Garry,
> I know this is a dumb question....but did you tune the primary to the
> secondary? It has to be on the nut or it will not fire.
> ----- Original Message -----
> From: "garry neeley" <bamacoiler@xxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Tuesday, September 16, 2008 9:56 AM
> Subject: [TCML] yet another 833c vttc with problems
> > I just finished my first VTTC. It's a single 833C closely following
> > Steve
> > > Ward's single 833A schematic. The specs:
> > > Secondary - 3.5" x 19" x #24
> > > Topload - 3" x 7.5" toroid, about 1" above the top turn.
> > > Primary - 29 turns #12 THHN on a 6.25" green pipe. Bottom turn level
> > with
> > > secondary bottom turn.
> > > Filament supply - rewound mot, 10V even (does get warm).
> > > Plate supply - very large (physically) old mot, voltage
> > > doubler 2.00uf, mo diode, 1800pf10kv ceramic disk
> > > Tank cap - 2nf 40kV
> > doorknob
> > > Plate filter - 10 turns #12 on 30ohm 20W
> > > Feedback coil - 22 turns #24
> > > Grid leak - 5k 100w fixed, 1800pf 10kv ceramic disk
> > > Everything is wired with #12 wire. All connections are tight.
> > > brand new rf parts taylor 833c
> > No staccato yet
> > >
> > I can't even get the coil to oscillate. I've tried switching polarity on
> > the grid coil and a few other things. No plate glow at all and I can't
> > light up a flourescent light holding it right up to the secondary. All I
> > got so far is the filament glowing lol. Help!!!
> > Garry Neeley aka Bamacoiler
> > _______________________________________________
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