Re: [TCML] Basic Circuit Question

[Gary Lau <glau1024@xxxxxxxxx>]

I would agree that the gap should be in parallel with the transformer.  But
either configuration is equally vulnerable to resonant rise.  The difference
is that when the gap is in parallel with the transformer, during the
interval when the gap is conducting and the tank circuit is ringing with RF,
the now-shorted gap is effectively shielding the transformer from the RF.
The difference comes down to how much RF energy the transformer is exposed
to.  Performance-wise, the two circuits are equivalent.

Regards, Gary Lau
MA, USA

On Mon, Feb 7, 2011 at 11:38 PM, Dr.Hankenstein <
dr.hankenstein@xxxxxxxxxxxxx> wrote:

> Are you sure you didn't mean that it is correct to place the spark gap
> across the transformer? All my spark gap coils including the big one
>
> http://www.audiotesla.org/images/Zotzilla%20Pictures/zotzilla%20web%20images
> /IMG_5054.jpg  Have the spark gap directly across the power transformer.
> This technique helps prevent over voltage of the transformer HV winding.
> Suitable RF transient protection should be employed ahead of the
> transformer, of course. Connecting capacitor across xfmr may cause
> dangerous
> resonant rise.
>
> Hank
>
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
> Of Peter Terren
> Sent: Monday, February 07, 2011 8:25 PM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Basic Circuit Question
>
> Capacitor across power supply is correct.  Limits voltage peaks to
> transformer.
>
> Cheers
> Peter
>
>
>
> ----- Original Message -----
> From: <rdragovich@xxxxxxxxxxx>
> To: "tesla forum" <tesla@xxxxxxxxxx>
> Sent: Tuesday, February 08, 2011 10:34 AM
> Subject: [TCML] Basic Circuit Question
>
>
> >I am currently gathering the parts to build a small Tesla coil. I have a
> >basic question on the circuit. Several of the schematics show the primary
> >capacitor in parallel with the power supply secondary and the spark gap in
> >series. Other designs show the primary capacitor in series with the power
> >supply secondary and the spark gap in parallel. What is the difference in
> >operation and which one should a beginner build?
> > Thanks for your help. Richard
> > _______________________________________________
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> >
>
>
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