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Re: vttc_project_picture

Original poster: "resonance" <resonance@xxxxxxxxxxxx>

We have our 91 Amp Irms variac replacement in Cadence software and Beta testing at present. It uses back to back SCRs and a unique driver/phase/isolation circuit that drives the SCRs and gives full control with highly inductive loads --- similar to a variac only our unit only weighs 2 lbs and will replace any variac up to a 3 stacker (90 Amps rating). It can handle small 10 and 20 amp variac replacements without breaking a sweat. You still need to use a small series reactor when running with a PT, pole xmfr, or MOT.

Watch for more on this in Feb and early March. We hope to offer a stuffed board with the SCRs --- you just provide the heatsinks. We hope to be able to do this for around $100 range. It will be very light and portable and fit into almost any standard 7 inch cabinet rack mount.

I will keep you posted as we progress.

Dr. Resonance

Original poster: Brett Miller <brmtesla2@xxxxxxxxx>

Here's a picture of my upcoming single 833a system
basically in mockup form.  I basically just have to
wait for a few things to arrive and then wire
everything up and attach to my RF ground.  The 20a
variac is ready and I will be using a second variac or
maybe just a dimmer on the filament tranny.



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