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Re: [TCML] BPS Testing

Hi Phil,

I would have expected at least 43" sparks with the .04uF cap. How did it run (what type of heartburn?).
Take care,

Lau, Gary wrote:
-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
Behalf Of FIFTYGUY@xxxxxxx
Sent: Tuesday, March 11, 2008 5:23 PM
To: tesla@xxxxxxxxxx
Subject: Re: [TCML] BPS Testing

In a message dated 3/11/08 8:49:25 A.M. Eastern Standard Time,
Gary.Lau@xxxxxx writes:

When I was using a static gap, I ALWAYS ran with 140VAC.  If  the knob goes
up to 11, why stop at

Sounds like something from "This is Spinal Tap".  :)


Beyond that, I seem to have been blessed with a 15/60 that's  endowed with
This must be why I'm able to use larger than typical cap values  (.02uF w/
static, .04uF w/ SRSG).

Well, that certainly makes *me* feel better! I've  been trying to duplicate
your results, and with just one unmodified 15/60  Franceformer I got a lot of
heartburn running a .04uF cap on a 120BPS SRSG. I  always had to add a 15/30 to
get it to halfway work!
    You mention on your Website that you bought  your NST used, and had to
re-pot it. You also mention that the shunts  were impossible to remove (I know
what you mean, I've got a bad 15/30  Jefferson with a one-piece core).  But you
*don't* mention on  your Website what brand of 15/60 NST you've got! What is
this wondrous  thing?

Sorry, I didn't mean to be secretive.  My 15/60 is also a Jefferson.  I initially cursed it when I found that I couldn't remove shunts, but all is since forgiven.

What happened when you tried .04uF with just your 15/60?  I would guess that the worst that would happen would be just a lower than optimal bang voltage.  But then odd stuff may happen when the cap to too much LTR...

The mains current, even with PFC caps, was close to 20  Amps.
How much of that is reactive current?

I don't have a numerical answer, but I would guess not a lot, as I spent a fair bit of time determining that my 200uF of PCF caps was pretty much optimal.

Regards, Gary Lau

-Phil LaBudde

Center for the Advanced Study of Ballistic  Improbabilities

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