Re: New project

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "S&JY" <youngsters@xxxxxxxxxxxxxxx>

David,
One way to get longer sparks with 4 inch diameter secondaries is to build an
identical second coil, run the primaries in series, tapped at half the
inductance for a single primary, so the series connected primaries still
tune to the same frequency.  Ground both secondaries & use a second "huge
toroid".

I built such a setup and got over seven foot connected streamers running
3ish KVA.  But like you infer, you are pushing your luck and probably should
think about going to a 6 or 8 inch coil for more than 3 KVA.  At least be
sure to have a couple of internal baffles in your 4" coil before increasing
power to it.

--Steve Y.


----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Tuesday, October 10, 2006 9:31 PM
Subject: Re: New project


> Original poster: "david baehr" <dfb25@xxxxxxxxxxx>
>
>
> In your opinion, whats highst practical KW input for a 4" dia. coil
> ?  I mean, there comes a point in the quest for longer sparks , that
> its just more practical too increase dia. for more output. I run 3kw
> into such a coil, and, feel Im reaching the limit. I may have reached
> close to 5 feet , with a huge toroid. ( static gap only )  any other
> 4" coilers out there want to coment ?
>
>
> From:  "Tesla list" <tesla@xxxxxxxxxx>
> To:  tesla@xxxxxxxxxx
> Subject:  Re: New project
> Date:  Tue, 10 Oct 2006 19:10:32 -0600
>  >Original poster: "resonance" <resonance@xxxxxxxxxxxx>
>  >
>  >
>  >I have a complete design for a Tesla coil that produces long sparks
>  >from a 12/60mA NST.  Contact me off-list and I will email the plans
>  >to you.
>  >
>  >
>  >Dr. Resonance
>  >
>
>
>
>
>
>