[Prev][Next][Index][Thread]
Re: NEON- eddy coils /induction heaters
On Sun, 7 Sep 1980, Frank Varnell wrote:
> >I keep seeing you talking about your eddy coil quite matter of factly.
> >can you share more info on this. I have an induction heater that's
> >pretty good, however I am looking for others. I have a coil wrapped
> >around some U shaped ferrites. This eliminates have to seal the
> >tubulation through the coil. Let's get an HF discussion going.
> >
> >Jacob
>
> How many turns? what freq? Dou you have the ferrite info?
I don't have this thing handy. I lent it to a friend in NC. I will see
it again next spring when we do our "experiments in neon" workshop.
Unofficial dates are May 27 to June 8 and June 10 to June 20.
At that time I'll put in on the scope. Untill then I beleive it is
running at about 500KHz at about 50 Watts. The coil is (I think) 4 wraps
of 8 gauge stranded wire. The ferrites are four pieces if 1/2" round
(cross section) 2"x2" "U".
I tried to trace out the circuit once and found a few mystery
components. The circuit appears to be two transistors in oscilation
dumping into a coil with a capacitor accross the output. The coil has a
few windings used for feedback to the oscilator (Hartley Style).
I do have some very sharp photots of this thing if you want to examine
it. I also have my chicken scratched schematic. Wnaa see 'em? It may
take some time to dig these things up. Meanwhile maybe Dirk will help us.
Jacob
> Dirk,
> Is your eddy coil "gun" open like a U?
>
> --
> /========================================\
> | Frank Varnell |
> | personal email : fvarnell@sd.znet.com |
> | work email: frank@xlnt.com |
> | work phone: 619-487-9320 |
> \========================================/
>
Follow-Ups:
References: