Re: low vs high frequency tesla coils?

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

Original poster: "joseph gallo by way of Terry Fritz <twftesla-at-uswest-dot-net>" <juzeppy-at-hotmail-dot-com>

Hi Ralph, Dunckx
I got the idea to put the two 3kv 20mil amp transformers in series from the 
poptronics july article where they use four 4kv 30mA transformers to get 8kv 
at 60mA.for a tesla coil.
I am using open core France transformers with a plastic nameplate that 
snapps off and has a date stamped on it.  I tried them in series with 
alligator clips. there was no corona that I could see on the windings.
Fortunately I have not seen a transformer fail. What do I have to look out 
for. I don't want to fry my trannys but it is tempting to get the higer 
voltage.   Could I place them in mineral oil to better insulate the 
windings?
joseph



>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: low vs high frequency tesla coils?
>Date: Wed, 17 Jan 2001 18:00:11 -0700
>
>Original poster: "Dr. Duncan Cadd by way of Terry Fritz 
><twftesla-at-uswest-dot-net>" <dunckx-at-freeuk-dot-com>
>
>Hi Joseph!
>
>Date: 17 January 2001 00:29
>Subject: low vs high frequency tesla coils?
>
>
> >Original poster: "joseph gallo by way of Terry Fritz
><twftesla-at-uswest-dot-net>" <juzeppy-at-hotmail-dot-com>
> >
>
>
><snip>
>
> >I now have two new 3kv 20 mili amp neon trannys Ill put in
>series)
>
>
>As Ralph says you want these in parallel or not at all!
>
> >My question is what are the advantages of designing a low
>frequency coil as
> >opposed to a high frequncy coil(or disadvantages) using the
>same power
> >supply.
>
>The losses tend (note: *tend*) to be lower at low
>frequencies. FWIW, if this was my setup, I think I'd use a
>former around 2-3" diameter, maybe 15-18" long, and wind it
>with wire around 30awg and go with whatever that gave me. (I
>graduated magnum cum laude from the "It'll do" School of
>Tesla Coiling.)  Others on this list will have other ideas
>on that.
>
>Dunckx
>
>
>

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