Re: inductor current limiting for MOTs

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

Original poster: "Allanh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <allanh-at-starband-dot-net>

I'm using 4 to 5 MOT's in series. I tried several types of
ballast, but the one that seems to work best for me is
an old heating element from an electric dryer cut into pieces, one for each
MOT. The lengths can be chosen to
suit the desired power level. Some heat is generated but its small compared
to the overall power consumed. I got
my dryer element from a friend who was taking his old dryer to the dump.
These elements aren't very expensive if you buy a new one.

Good luck,

allan

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, July 08, 2002 7:16 AM
Subject: inductor current limiting for MOTs


>
> Original poster: "Laurence Davis by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <meknar-at-hotmail-dot-com>
>
> I've gathered a few MOTs and realized that I have to current limit
> them.  I want to build a small static gap coil with 1 or 2 of them.
> Some of the people running MOTs have used inductive current limiting.
> However I don't know the equations for calculating the
> inductance required.  can someone point me towards the equations?
> What shape of core should i use for the choke;
> cylindrical or toroidal?  And to choose the material... I'm assuming the
> current limiter would be placed before the chokes limiting the feedback
> of the high frequency from the primary tank circuit.  Therefore the
> frequency would be 60hz.
>
> thanks, larry d.
>
>
>
>