Re: MOT with chopped off primary -- Anyone tried this before?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Paul B. Brodie" <pbbrodie@xxxxxxxxxxxxx>

I'm sorry but I don't understand whether you are winding more or less turns 
on the primary. You just say that you wound 30 turns. Also, why would too 
few turns make the transformer ineffective. Can you explain, please? One 
other thing, are you using a MOT designed for 240 volts, like in the UK or 
120 volts, like in the US? Regards.
Paul
Think Positive

----- Original Message -----
From: "Tesla list" <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
To: <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
Sent: Monday, July 04, 2005 10:09 PM
Subject: MOT with chopped off primary -- Anyone tried this before?

> Original poster: "Wilson Ng" 
<<mailto:metalstorm2002@xxxxxxxxxxx>metalstorm2002@xxxxxxxxxxx>
>
>
>
> Hello. I've read an old posting about connecting the filament winding of a
> MOT to  a light
> dimmer/capacitor combination. It worked for me. However I've found that
> increasing the
> capacitance dosen't increase the output power of the MOT that much. I
> suspect that the filament
> winding has too few turns to be effective.
>
>   Then I painstakingly removed the primary and rewound it with 30 turns of
> #18 stranded wire.
> When used with the dimmer/capacitor setup, it worked much better. The MOT's
> output power is
> now equivalent to that of my ignition coil when a 10 mf cap is used. With
> this output power,
> my very crude and tiny tesla coil was able to produce up to 3" sparks. The
> only problem is
> internal arcing, which I've encountered several times when I adjusted the
> spark gap too wide.
> One thing I don't understand is why is there no internal arcing when the
> MOT's output is
> shorted with a .25" spark, but when it is used to power my tesla coil, a
> gap of this width
> causes internal arcing? Is it possible to solve this problem by
> disconnecting the end of the
> MOT's secondary winding that connects to its core?
>
> _
>
>