Re: Vttc's

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

Original poster: "Bert Hickman by way of Terry Fritz <teslalist-at-qwest-dot-net>" <bert.hickman-at-aquila-dot-net>

Hi James,

The horizontal coil sounds especially interesting! I'd like to get more 
info and specs on both systems since I've got a nice batch of 5868's.

Thanks!

-- Bert --
-- 
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Where Small Change is created "Electromagically"
Coin crushing by powerful electromagnetic fields
Stoneridge Engineering: http://www.teslamania-dot-com
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Tesla list wrote:
>Original poster: "James by way of Terry Fritz <teslalist-at-qwest-dot-net>" 
><mustang3-at-cox-dot-net>
>Hi Group,
>     I sure am glad to see all the interest in the toob coils. I have a 
> good performing horizontal coil. It produces 27 inch sparks using a 5868 
> triode tube. These are industrial toobs rated for 500W. plate dissipation 
> and most importantly(for tesla coils) have a graphite anode. This means 
> they can tolerate a severe overload without going gassy. The PS is a MOT 
> with 1/2 wave doubler. Filament transformer is a rewound MOT. The 5868 
> needs 10V. on the fils, so my xmfr needed 10 turns of #10 THHN copper 
> wire. The secondary is 6 in. in diameter, wound with 48 inches of #27 
> wire. Resonant freq is 96KHz. I use the mica transmitting caps for the 
> plate coil cap. The toob Tesla coil puts a real strain on plate caps. You 
> always have to calculate the current in the tank cap. I have blown 
> several caps by overcurrent. I'll enclose a couple of pictures of it. I 
> also have a WMA video of it when it was using two 304TL tubes. I can 
> email this if any would like it.
>     My vertical toob coil uses two 5868's in parallel. The secondary is 6 
> in. in diameter, wound to 27 in length with #27 wire. It's resonant at 
> 153KHz. With 8 - 9 KW input power it makes 36 inch sparks. It's PS is a 
> big transformer, 6000 volts at 1A(rated).
> 
>
>Later,
> 
>
>James
>
>.