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Re: Strange events and me coil unexplained
Date forwarded: Wed, 16 Dec 1998 14:00:09 -0700
Date sent: Wed, 16 Dec 1998 12:04:29 -0700
To: tesla-at-pupman-dot-com
Subject: Strange events and me coil unexplained
Forwarded by: tesla-at-pupman-dot-com
From: Tesla List <tesla-at-pupman-dot-com>
> Original Poster: "Paul Marshall" <klugmann-at-hotmail-dot-com>
>
> Hey everyone,
> Last night I ran my 6.5" coil at approximatly 5 Kw. 14.4 Kv. My air
> choaks melted. They were wound with 18 AWG insulated wire. Even the PVC
> core melted and twisted. How is this possible, there should only be
> millamps on the HV side ? My capacitance has also increased. I made
> these caps over a year ago. Each cap is .026 uf. I have 4 in the
> circuit, two each in parallel and then these two circuits are in series.
> Ordinarly I'm taped out with the large top load at the 13 th. or 14th.
> turn. Last night I had to tap in to the 9th. turn ! A few weeks ago I
> move the coil outside and noticed that I had to tap in. I attributed
> this to ground clutter. Could the caps still be setteling ?
> The calculated value of these caps were .026 uf. They had a measured
> value of about .024 uf. They are poly plate caps. Does anyone have
> anyone have any ideas about the RF choaks or the the caps ?
>
> thanks,
> paul m
>
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>
I have accidentally wound chokes that ended up resonating at my Tesla
coil's tank frequency, and the chokes got so hot that the insulation melted
off the wire. You first need to calculate the inductance of your old coils,
then wind new ones with a different (larger) value, and I think this will
probably solve your problem.
Bert Pool