Re: I'm a newbie coiler!- apartment coiling

["Tesla list" <tesla@xxxxxxxxxx>]

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

Phil,

Yes, as I indicated in my previous post, the twin primaries should be each
about half the inductance of a primary for a single Tesla coil, assuming you
leave the primary capacitance the same.  This does not mean half the turns -
use one of the TC design programs such as WinTesla, and you can see it only
takes removing a few outer turns of a primary to reduce the inductance to
half.

I have not tried parallel primaries as that would require doubling the
inductance of both, and I don't see any advantage to this arrangement.
--Steve Y.

----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Tuesday, March 14, 2006 7:00 PM
Subject: Re: I'm a newbie coiler!- apartment coiling


> Original poster: FIFTYGUY@xxxxxxx
>
> In a message dated 3/13/06 5:05:53 AM Eastern Standard Time,
> tesla@xxxxxxxxxx writes:
>
>  >One good solution to a poor, distant ground is to build a twin TC.  This
is
>  >made up of  two identical coils that act as each other's counterpoise.
>  >Primaries are connected is series, each having half the inductance of a
>  >single coil.
>
>      I've looked at doing a twin system, and this primary
> configuration has bugged me.
>      Say you have a nice, well-tuned sngle-secondary TC. But then you
> want to make it a twin. Well, if you connect the primaries in series,
> you have twice the inductance. And thus you have to use half the
> primary capacitance to retune the primary. And thus you give up half
> your power and your twin spark length will go to only 1.4 times the
> length of the original coil (oversimplifying things?) instead of
> twice the length.
>      Better to keep the same inductance by redesigning each twin
> primary to be 1/2 the original's inductance, but maintain same
> coupling to each secondary?
>      Has anybody ever run a twin with *parallel* primaries?
>
> -Phil LaBudde
>
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