[Prev][Next][Index][Thread]
Re: first coil
In a message dated 2/24/99 2:39:43 AM Pacific Standard Time, tesla-at-pupman-dot-com
writes:
Guy - see comments below, Ed Sonderman
> Original Poster: "G.Wilson / B.Petersen" <wilson-at-vossnet.de>
>
> I am very nearly at the point of firing up my first coil -perhaps only a
> few weeks away. i still have a few questions
>
> 1
> Is it important that the Toroid plate (in the hole of the doughnut) is a
> non conductor coated with foil on each side or can this be, for example,
> an aluminium plate ?
Sounds fine. Most of my toroids use .25" thick acrylic for the center (and
mounting)
disc and I cover both sides of it with aluminum tape.
>
> 2
> My secondary is coated with acrylic spray "varnish" on a 3 inch pvc (or
> pp) tube which I also coated with varnish. The wire is 22.5 gauge
> (0.6mm) and 24 inches long. Any problems ? I am a bit worried as I did
> not allow the "varnish" on the former to dry well before winding.
>
This should be fine. Many folks do not apply any coating under or over the
wire. You should be in fine shape.
> 3
> I am thinking of using the filter circuit from Terry fritz (thanks
> Terry) with four 4.7k 50w wirewound resistors and 8 15kV 1000pf ceramic
> filter caps giving 30kV and 1000pf on each leg to RF ground. I have also
> made two "kickback" chokes with 70 turns of wire on 2 inch plastic
> formers - would it be overkill to use these as well ?
I am not a good one to comment on this. I have not lost a lot of neon sign
transfromers. I use only series resistors on my system.
>
> 4
> The Tank Cap will be chains of 70nF MKP - 15 in each chain and up to 6
> chains giving up to 28nF in steps of 4,7nF. (As used with good results
> by Reinhard Walter Buchner) Should there be any cross linking between
> the chains ?
>
I would not add any cross links between chains.
> More Coiler Greets from Germany (sorry Reinhard).
>
> Guy Wilson
>
>
>