Re: [TCML] High voltage input snap when adjusting unloaded Terry saftey

[otmaskin5@xxxxxxx]

Seems like you should be getting more out of a 12/60.? I've gotten?close to that (18-20")?with?a 9/30 NST coil.?? Dennis Hopkinton MA







-----Original Message-----
From: Dr.Hankenstein <dr.hankenstein@xxxxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Sun, 9 Dec 2007 10:53 pm
Subject: RE: [TCML] High voltage input snap when adjusting unloaded Terry saftey



I use two concentric rings across my capacitor on my Table Top Tesla Coil. They 
are adjusted to approx. 1/4". It produces 18~22 inch sparks at 7 amps. This 
seems to protect the oil filled cap and the NST (12kV 60mA) quit well as there 
are over 700 hours of operation on the coil with no malfunction since 1994. The 
gap has on odd occasions fired for "no apparent reason". I think all these 
filters are a waste of time and money and produce other unwanted side effects as 
well. Check out the link: (The cap is the big white cylinder)

http://www.drspark.org/images/wwt44.jpg

Regards,
Woo

dr.hankenstein@xxxxxxxxxxxxx
"We put the fire in the wire."


> [Original Message]
> From: Jim Mora <jmora@xxxxxxxxxxx>
> To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
> Date: 12/9/2007 6:38:00 PM
> Subject: [TCML] High voltage input snap when adjusting unloaded Terry saftey
>
> Hello,
>
>  
>
> I was adjusting safety gap for my used Terry filter. This will be for 4"
> demo coil which has a block diagram what stuff is and the wire path.
> Independent of that, I was setting my safety gaps to fire at 140v (measured)
> in, on the bench. Wow, just before the safeties fire, I get a 2" hot snap
> accross the filter input. It is a very dry out and that stress has to be
> seen across the outputs of my 12KV, 30+ma repotted neon. They safties start
> firing immediately afterwards. I closed them a bit, about right, and it
> still happens unless I ramp the voltage up very slowly. Is this a reverse
> resonance rise and a discharge of the filter caps? I should mention that I
> need to shunt some transorbs as they are set up for a 15KV PSU. I'm Glad the
> tranny is still working!
>
>  
>
> Has anyone else ever seen this happen with the classic filter?
>
>  
>
> Thanks,
>
> Jim Mora
>
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