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Re: Neon XFRMR Protection



Hello to all,

 Well, I have been following the posts concerning RF filtering and have come
up with a design for my resonator, based upon the matierials that I will have
at hand and on what I have geaned from the many knowledgable people in this
group. I am currently working on the road, so this is all on paper (or should
I say disk?). Ok. Now for the details:
 I will be running a resonator with a 15KV 120mA neon, .014uF-at-18KV RMS (well
at least on paper, as it is a home made LDPE plate Cap in oil), 30-40 uH
primary, and a series stationary gap. Now for the filter. I have 8 T-250-B
toroids and 2 Arnald toroids from Burt. Now I plan on winding them with 50-60
turns of 20-22 guage single strand hookup wire rated at 600 volts and placing
5 on each leg for about 3 mH (?). Next I will place 2 doornobs rated at 4000
pF-at-30KV in series on each leg to the RF ground for a total of 2000 pF-at-60KV.
The chokes will also be in series with 2 Kohm-at-100(?) watt  resisters. And
there will of course be the safety gap to the RF ground. 
 So now if anyone can see any gaping holes in this setup please show no
mercy in the criticism, as so the RF does. I am looking for about 90%
reduction in the RF back to the neon and am willing to lose some power threw
the Caps. Also, if I am sigifigantly off in estimating the inductance value
of the chokes, please anybody who has actually measured or knows better, let
me know. Also, I am not sure about the current rating of the resisters as
there is a potential for 900 watts on each leg, so in theory they should be
rated at 900 watts? I am not a specialist in electronics, but am working on
learning more. Well I would like to thank everyone in this group for the
facinating info being exchanged and to those who have replyed to my previous
posts.
Thanks.

David Trimmell <DavidT-at-aol-dot-com or dwt-at-efn-dot-org>