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Re: It works! Solid state driver (fwd)
From: RODERICK MAXWELL[SMTP:tank-at-mail.magnolia-dot-net]
Reply To: tank-at-mail.magnolia-dot-net
Sent: Thursday, December 04, 1997 7:02 PM
To: Tesla List
Subject: Re: It works! Solid state driver (fwd)
Tesla List wrote:
>
> Date: Wed, 3 Dec 1997 20:48:24 -0700
> From: Don Huff <w6jl-at-e-z-dot-net>
> To: Tesla List <tesla-at-pupman-dot-com>
> Subject: Re: It works! Solid state driver
>
> Hi Max,
>
> CONGRATS on the encouraging work with your SS driver. Are you using a
> half-bridge?
Nope. It is a push-pull supply.
Sounds like it (2 FETS per leg, 4 total, must be 2 legs, hence
> half bridge, yes?).
I'm sorry if I confused you. It is push-pull transformer with 2
transistors on each END of the center tapped primary. This to aid in
power disapation. I have since removed one transistor from each end,
because after last nights tests two transistors seem more than capable
of handling the power.
1 KV AC is what you will be driving your primary
> with, right?
Yes.
> I would think you would be running the half-bridge at whatever frequency your primary >system will be resonant at, is that right?
The only primary is the one wrapped around the core of the output
transformer.
>No rectifier, just AC square wave drive.
Yes.
>No spark gap, just ringing the primary LC with an AC power source at the resonant >frequency. Am I correctly describing what you are doing?
One end of the secondary will be connected directly to the bottom of
the secondary.The other to earth ground.
> I am interested in this approach if it can be an alternative to spark gaps.
>
> Good luck, and give more details if you can. I am pretty familiar with
> switching power supply topologies and design.
I'm glad someone is! This will be my second attempt!
I got all of my Ideas from Duane A. Bylund's book Modern Tesla Coil
Design. But I made a few changes of my own.
Frankensteins Helper
Max