Re: [TCML] Don't forget the Terry Filter!

[DC Cox <resonance@xxxxxxxxxxxx>]

When you get a chance, pick up a nice 12 kV PT, and with a simple filter,
run your coil forever without blowing the xmfr.

Dr. Resonance





On Sun, Mar 22, 2009 at 1:03 PM, bartb <bartb@xxxxxxxxxxxxxxxx> wrote:

> Hi All,
>
> Yesterday, I went after cleaning up in the garage. My little 4.5"D coil was
> full of dust and debris, so I cleaned it off. I decided to put some of the
> pieces back together (NST was out). Anyway, after the cleanup and remounting
> the NST, I decided to give it a little test run. Nothing! Hmm... I remember
> I had a problem with the Terry Filter that I had yet to dig into. So, I
> unhooked the Terry filter and gave the coil another go. ZOOM!! Lot's of
> great sparks in the 5 foot range.
>
> Unfortunately, I had my garage open. A couple guys working on a house
> across the street showed up. After answering all their questions, I decided
> to run it again for them. Well, you know how that goes. Ran it for too long
> and too high of power. It ran great, they were thrilled. But, it all ended
> right when I decided to shut it down (hand on the variac just starting to
> turn it down). I didn't think much of it, but today I decided to check it.
> The NST is dead for the 3rd time. Looks like I'll be melting the wax out
> (it's filled with wax, so actually an easy process at this point).
>
> The Terry filter also includes the safety gap and I ran without it (took a
> risk and got bit). With the Terry filter, I've ran this coil non-stopped for
> 30 minutes without failure at 1.2KW with a static gap. This time without the
> filter, it lasted only 3 minutes.
>
> So, don't forget the Terry filter!
>
> Just a reminder.
> Bart
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