Re: Capacitor Help

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "MalcolmTesla" <tesla@xxxxxxxxxxxxx>

----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Friday, December 16, 2005 12:58 PM


> Original poster: "Lau, Gary" <Gary.Lau@xxxxxx>
>
> Hi Malcolm:
>
> VERY nice looking primary construction!
>
> Regarding a safety gap across your MMC - don't.  Should a gap across the
> MMC fire, the discharge current is limited only by the impedance of the
> gap arc, which is very low, and over-current damage to the MMC may occur
> if it happens too often.  Instead, the safety gap should be in parallel
> with the main gap.

Rich said the same thing.  Put the safety gap across the NST which is
parallel to the spark gap.  I'm not sure I understand how that helps.  Rich
mentioned a third terminal in the safety gap which goes to ground.  I assume
110 green wire ground?

> The same safety gap in parallel with the main gap will limit the voltage
> seen by the MMC to the same level, but should that fire, the discharge
> current will be limited by the primary coil's impedance - the same as
> during a normal gap discharge.  The same level of protection is
> achieved, without risk of cap damage.

How does the safety gap drop the excess voltage across the caps any better
than the spark gap is already doing when the spark and safety gaps are in
parallel?

Thanks
Malcolm


> Regards, Gary Lau
> MA, USA
>
>
>  > Original poster: "MalcolmTesla" <tesla@xxxxxxxxxxxxx>
>  >
>  > ----- Original Message -----
>  > From: "Tesla list" <tesla@xxxxxxxxxx>
>  > To: <tesla@xxxxxxxxxx>
>  > Sent: Thursday, December 15, 2005 7:58 PM
>  >
>  > Thanks.  I got the strike ring make tonight too
>  > http://www.v8-ranger.com/temp/tesla/19.jpg
>  > I wasn't sure if I was supposed to connect one end of it to earth or
> not?
>  >
>  > And I made my capacitor bank or MMC as I believe it's called.  I also
> put 10
>  > Meg 1/2 watt resistors across each cap as suggested.
>  > http://www.v8-ranger.com/temp/tesla/20.jpg
>  > http://www.v8-ranger.com/temp/tesla/21.jpg
>  >
>  > Still need to make the safety gap across the MMC and wire up the HV
> stuff.
>  > Oh and winding the secondary and building  my torid are the last two
> major
>  > things.
>  >
>  > Do I adjust the safety gap across the MMC slightly larger than what
> ever my
>  > spark gap gets set at?  1/8" or 1/4" wider, maybe?
>  >
>  > Thanks
>  > Malcolm - KC
>  >
>
>
>