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Re: [TCML] Appropriate Spark Gap for a 15/30 NST



It's a squirrel cage blower around 200 to 300 CFM (not sure exactly). There is an attached 120V AC motor on back of blower. I believe the manufacturer is Dayton.

Regards,
Bart

Brandon Hendershot wrote:
Very nice, that's almost exactly how I envisioned mine to turn out. What's that fan exactly? Looks like something out of one of those inflatable lawn decorations people put out at Christmas.

On Dec 30, 2009, at 3:59 PM, bartb <bartb@xxxxxxxxxxxxxxxx> wrote:

Hi Brandon,

The type of spark gap your building is the tube type that DC is referring to. Your 15/30 will do just fine with that particular gap type. For what it's worth, I prefer using 1" to 1.25" diameter tubes spaced .050" between each pipe. Then a hefty air flow.

http://www.classictesla.com/photos/ba45/s2752.jpg

In the above photo, you can see that I epoxied the tubes to the inside of a white pvc cylinder. That cylinder simply slides into the larger outer pvc pipe that is epoxied to the fan (makes it easy to remove for cleaning or whatever). Ignore the solid brass gap sitting on the floor (that was just something I tried and it was lousy).

Take care,
Bart




Brandon Hendershot wrote:
I was recently sifting through some of your guys' posts, and found this quote from DC;
"For 60 mA and 120 mA xmfrs a multiple tube copper pipe
or hyperbaric gap is best way to go."
That got me thinking about which type of gap is best for my tranny (15Kv 30mA. I'm in the middle of building a Richard Quick Spark Gap for it. Should I resume building it, or should I resort to one of the other types of gaps before I get too far into this one?

Thanks everyone,
Brandon
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