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Re: [TCML] Spark gap



Just  a "WAG" to measure BPS.
Get an old current transformer or a cheap amprobe from Harbor Freight and monitor the input line. Take the amprobe apart to get at the sensor winding. Have a scope or frequency counter connected to the transformer or amprobe and watch the current spikes. In theory, the spikes should correspond to the firing of the gap.
Certain dynamics may not make this work but an interesting "guess".

Frank

At 12:02 AM 2/26/2008 -0500, you wrote:


In a message dated 2/25/08 11:40:07 P.M. Eastern Standard Time,
bartb@xxxxxxxxxxxxxxxx writes:


>Sound is a viable option. I'll consider that. I'll start with the

>photons first, but I'll keep that in mind. Not only the pitch which  can

>give a rough guesstimate, but maybe better resolution using sound  as a

>trigger, "level" set of course, but certainly  possible.

    An off-the-shelf possibility for audio is a PACT  Timer. Handy for
figuring out how fast your machine guns are running:

_http://www.pact.com/_ (http://www.pact.com/)

    Easy enough to use a remote microphone or just  record and playback the
sound, if you're worried about hurting digital equipment. Or just stand back.
Heck, last time I ran my SISG coil I could hear  the roar of the secondary
arcs echoing off the houses around the corner 100 yards away. So reflections and
false triggers from them might be a  concern.

-Phil LaBudde
Center for the Advanced Study of Ballistic  Improbabilities






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