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Re: Solid State - progress.
Tesla List wrote:
>
> >From bigr-at-teleport-dot-comSat Jun 8 08:19:01 1996
> Date: Thu, 06 Jun 1996 22:11:16 -0700
> From: bigr-at-teleport-dot-com
> To: tesla-at-pupman-dot-com
> Cc: Tesla-list-subscribers-at-poodle.pupman-dot-com
> Subject: Re: Solid State - progress.
>
> I'm not sure from reading the message what type of solid state system
> you are building.
>
> Here I have a multi-MOSFET multi KW peak power pulsed driver that I
> connect to a "resonant coil" (i.e. not really a tesla coil since it is
> not a transformer). My coil is like a "magnifier" without the Tesla
> coil driver. Or like a 1/4 wave antenna if you're into radio. It has
> about a mile of 30 gauge wire on it and resonated somewhere in
> 50-75khz range, I forget. Puts out 150kv plus at higher current I
> believe than ordinary Tesla coils. Is wound on huge poly bucket.
>
> I got the idea from the driver from an old hobby magazine that used
> bipolar transistors. Mine has four IRF740's in half bridge and I
> pulse them at the limit of their SOA curve. I use a UC3825 very high
> speed current-mode PWM IC to control the mosfets, and a LM555 to
> control the duty cycle of the power "on" time. I sense primary
> current in the ferrite transformer and its neat to see current mode
> come into its own with the coil when it is not tuned to resonance.
> The half bridge output is connected to a huge ferrite core
> (77material) transformer from a 1kw power supply. I believe that I
> use 10 turns of 12 gauge teflon wire for the primary and about 200
> turns of ?? gauge for the secondary.
>
> I need to put together a schematic as this project is one of the few
> that I now have without documentation. but if there is any interest,
> maybe I can get motivated to do this.
>
> best regards, Rob. N3FT.
I, for one, would be extremely interested in a schematic and all the
specifications, part #'s, suppliers, etc.
- Brent Turner