Re: induction heater

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Matteo Mariani by way of Terry Fritz <teslalist-at-qwest-dot-net>" <marians19-at-hotmail-dot-com>



Hi

I suggest you to try with Vladimiro Mazzilli's Current feed royer 
oscillator, and a bifilar wound coil made by a big gauge litz wire, I used 
it to activate neon sign electrodes in a He-Hg laser tube and it worked 
perfectly!!

Here is the schematic:
http://www.hot-streamer-dot-com/temp/mazzilli/Royerfin.pdf

To build an induction heater, just remove the output transformer, and place 
a single  center tapped coil coil, and use as tank capacitance big MKP 
capacitor (about 1 or 2 uF): the best configuration is to use lots o caps 
in parallel, to reduce the ESR and ESL and achieve higher output currents.
The circuit works perfectly with IRFP460 mosfet, Vladimiro used BUP314 in 
order to achieve higher switching voltage and high speed, to use this 
circuit as a SSTC.
Remember that the voltage across the coil is about Vin]pi, so use adeguate 
capacitors!!!!!
Cheers,
Matteo

>I recall somebody on this list has a web page about a homemade induction
>heater. Does anybody know what site this may be? I need to make some sort of
>induction heater to heat parts for my vacuum tube project.
>
>
>KEN