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Re: Magnifiers;RF X-former HV hold off

to: Dwight

Your pig is supplying 14.4 kV rms, however, your cap charges to 1.414 x
Erms (peak voltage) so your input is actually approx 1.4 x your xmfr
potential.  This is used with your turns ratio equation to obtain the
correct output from your driver pri-sec coil combination.

Common house wiring is rated 600 volt but has over 10 kV breakdown, so it
is fine for your system.  If your budget can afford even better would be
MIL (spec) D.  We use this wire on most of our larger coils.  It has a 3 kV
operating rating and breakdown around 20 kV.

DR.RESONANCE-at-next-wave-dot-net


----------
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Magnifiers;RF X-former HV hold off
> Date: Thursday, October 01, 1998 6:16 PM
> 
> Original Poster: dwight duncan <duncand-at-ccsalpha2.nrl.navy.mil> 
> 
> 
> 
> Hi All,
> 
>     As you may know I am building my next magnifier system.  Now I am
> getting ready to wind the secondary of the RF transformer.  I figured on
> using #14 gauge on a 24" od polyethylene 55 gal drum.  The number of
turns
> should be appx. 150.  With my caps the primary will probably tap out at 4
> turn.  This is a turns ratio of 37.5:1, and my pig is going to give me
14.4
> KV.  That means the output of the RF transformer will be feeding the
> resonator at 540 KV.  Take that and divide it by the # of RF transformer
> secondary turns and you get 3.6 KV per turn.  Short of spacing the turns
> with fishing line, what should I do?
>     I bought Richard Hull's tape on "Magnifiers II" and he seemed to have
a
> very similar RF transformer design and power feed as I, but he clearly
> didn't have any problems with this turn to turn HV potential arc problem.
> It has been my experience that 1 KV / turn is about the max for magnet
> wire, and Richard used common THHN stranded #14 "Household" wire.
>     Am I worrying for nothing because the voltage will drop when the
> resonator is excited.  With my current magnifier the RF transformer was
> designed to take the full voltage and was done by having lower input
> voltage and as smaller turns ratio.
> 
> Please help me see what is staring me in the face.
> 
> Thank you for your patients
> Dwight
>