Hi Ed. Standard TC setup, except the {1K 25 Watt power resisters} are
connected between the NST HV leads and safety gap lugs on the coil.
Please understand, I have little technical knowledge here I was just
playing around and it worked! I would hope some of the more technical
minded members on the list would do a little trial and error with this, it
could possibly open a new source of usable NST's, ie [GF NST's] for small
and moderate coils.
These power resisters are inexpensive as are aluminum heat-sinks if needed.
I wish I had a 12 or 15K GF NST to test out but I do not.
Thanks for your reply.
Doug
On Fri, Nov 30, 2018 at 9:05 AM Ed <evp@xxxxxxxxxxx> wrote:
> What's your circuit?
>
> Ed
>
>
> On 11/29/2018 6:53 PM, Douglas Johnson wrote:
> > Gary, I am far from technical when it comes to this stuff as I am sure
> you
> > can see by a lot of my questions! It was just a fluke that I tried this
> out
> > of boredom. All I know is that it works. Take the resisters out, and GF
> > pops.
> > The resisters are similar in appearance to these >
> >
> https://www.ebay.com/itm/2Pcs-Wirewound-Ceramic-Cement-Resistor-0-5-1K-Ohm-5-25W-Watt/352350026175?hash=item5209b2b9bf:m:mowqAUe59odwZoiyCa7jxDg:rk:38:pf:0
> > Maybe it works because, in my ignorance, I didn't know it wouldn't😉
> > Doug
> >
> > On Thu, Nov 29, 2018 at 9:20 PM Gary Lau <glau1024@xxxxxxxxx> wrote:
> >
> >> I can't comment on your GF working in a TC. I've not personally tried
> it,
> >> but the prevailing wisdom is that it typically doesn't work in a TC
> >> application. I wonder if higher voltage GF NST's are more affected than
> >> lower voltage ones?
> >>
> >> The resistors - 1KOhm, 25Watt, 210-what? What are these for? It sounds
> >> like they're intended to be part of a protection network, except that
> >> resistors must be used with capacitors to form a low-pass filter
> network.
> >> By themselves or with safety gaps, resistors serve no protective
> purpose.
> >>
> >> Regards, Gary Lau
> >> MA, USA
> >>
> >> On Thu, Nov 29, 2018 at 6:22 PM Douglas Johnson <doug379306@xxxxxxxxx>
> >> wrote:
> >>
> >>> I had a 6K GF NST laying around and decided to see if I could use it
> on a
> >>> small TC. I ran a 1K 25w210 wire wound resistor between each leg of the
> >> NST
> >>> and the safety gap, it worked just fine. I switched the GF 6kv NST
> with a
> >>> non GF 6kv nst and the coil output was identical.
> >>> I was always told that a GF NST would not work for a TC??
> >>> Resistors are holding up ok.
> >>> Comments please
> >>> Doug
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