RE: [TCML] Spark gap

["Rich Schmuke" <rdj@xxxxxxxxxxxx>]

  Gary ,
	My transformer primary is 208 to 240 with several taps , I can input
0v to 280v on any taps. Secondary is 13Kv nominal so it could be 0 to 17Kv .
Transformer rating is 1.96Kva CCS. I would never have a continuous run so I
could run over the 1.96 Kva, the system has a inductive ballast for current
control. I said 200mA because I would not want to under rate the gap and
components if I make a different gap.

Rich 

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Lau, Gary
Sent: Saturday, February 23, 2008 9:04 PM
To: 'Tesla Coil Mailing List'
Subject: RE: [TCML] Spark gap

A couple of additional points not dealt with in previous responses...

1) If your power supply is indeed rated at 200mA, that's pretty beefy.  Most
static gaps are used at much lower power levels, and may have trouble with
the current you're talking about.  A rotary gap may be better here for that
reason alone.

2) Any static gap, RQ or otherwise, is unlikely to operate at 60BPS, or
120BPS.  All static gaps operate in what can only be described as a chaotic
mode, with the BPS varying widely from second to second.  A long-term
average is typically far higher than the mains frequency, usually in the
range of 150-300BPS.

For NST's (the only thing I have personal experience with), a sync 120BPS
RSG is better than a static gap because it allows one to use a larger cap,
resulting in a larger bang.  Spark length is all about using the biggest
bang possible.  And it guarantees that each bang is identically and
maximally sized.

Regards, Gary lau
MA, USA



> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of Rich Schmuke
> Sent: Thursday, February 21, 2008 11:00 PM
> To: Tesla Coil Mailing List
> Subject: [TCML] Spark gap
>
> I am going to ask a simple question but please give a simple answer. I am
> not a EE just a builder. I was asking about a rotor gap the other day and
it
> was suggested I try a propeller gap for my 200ma coil. Well I have a motor
> from a 8" hard drive now and am going to build a mount as soon as it is
warm
> enough to get to my shed. My question is why is a propeller at 3600 RPM
> better than a RQ copper tube gap?  60 cycle RQ  vs a 3600RPM it's the same
> break rate I think.
>
>
>
> Rich

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