Re: [TCML] First run

[Gary Lau <glau1024@xxxxxxxxx>]

If the Terry filter MOV's were clipping, they would be very hot, if not
smoking.  The MOV's shouldn't be clipping anything unless the gap is opened
too far.  Since your safety gap isn't firing and assuming the MOV's aren't
hot, I'd say it's good.  YOu shouldn't add any more MOV's unless you know
for sure that they're clipping at too low a voltage.

The MOV's that Terry originally specified were Panasonic ERZ-V10D182,
Digikey P7215-ND.  For a 15kV NST, a total of 16 of these are needed.  Any
more and the protection would be compromised, and any less, and the MOV's
will conduct and smoke all the time.  You're using a different part, so
it'll be up to you to ensure that you're using the right MOV part and the
correct number for your NST voltage.

By saying that the output of the filter seems weak, do you know that the
coil would perform differently without it?  I'd say give that a try if you
really suspect the filter, but I doubt the filter is the problem.  More
likely the Quick gap is not properly set.  That's one reason I prefer the
sucker gap - it's a lot easier to set.

Regards, Gary Lau
MA, USA

On Sat, Nov 13, 2010 at 1:29 AM, Steve Vance <steve_vance@xxxxxxxxxxxxx>wrote:

> Hello coilers,
>
> I have finally finished building my 12-30 NST powered 3.5" coil. I managed
> to get about 20" streamers on the first run. I think I can get more but I
> need to adjust the gap a bit. This is the first time I have used a Quick
> type gap. I like it's performance  but it is a real pain to adjust. I am
> considering adding another easily adjustable gap in series with it.
>
>  During the run the coil didn't seem to be as loud as it should have been
> and my safety gap didn't fire once in a 60 second run. I have it set to fire
> just beyond the bare NST voltage. On every other coil I've built the safety
> gap would fire every few seconds. I'm wondering if the MOVs in my terry
> filter might be clipping the the waves....Maybe thats what it's suppose to
> do.lol The output from the filter seems kind of weak to me though.  I am
> using 18 Panasonic ERZ-V14D182 (digi-key# P7227-ND) I have two more I can
> add if needed?? Anyone have any thoughts??
>
> Anyway, if anyone is interested I have some photos. I only got one spark
> photo before the camera battery died though.
> http://s241.photobucket.com/albums/ff282/steve-vance/12-30%20Tesla%20Coil/
>
> Steve
> _______________________________________________
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>
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