kickbackemf,
A mosfet can work,but you will run into a problem if the mosfet is a direct replacement component for the scr.Because,as you increase the voltage with the variac,it also increases the voltage and current to the scr's gate.An scr can handle alot of voltage and current to the gate for triggering,but a mosfet can't work with alot of voltage change or current.
Plus you will be pushing alot of voltage and current through the mofet and it will get very hot,even if it's rated for it.
HMS-776,
I had the VIC circuit system at my house twice.The first time was without the GMS control panel.I had to bypass parts of the systems to get the VIC cards to turn on.Then once I had them working I was able to get them to lock onto resonance.But there was never any gas being produced.When looking at the scope shots of the resonance signals,it looked alot like what we all have seen with our ouw setups.The only difference was that the scanner would lock onto the third harmonic of the signal.It never locked onto the first or primary one.By this third harmonic I mean,it would lock onto a pulse train of three pulses.The first pulse would be the largest,the second would a little smaller and the third would be the smallest,and then it would keep repeating.
The second time I had the GMS control system.I still had to bypass alot ot the rest of the systems to get it to work as well.Because the whole setup had to be wired into the buggy to work with the gas pedal,distributor and a few other things.Plus I didn't have the original wiring harness to hook it al up with.But this time I was able to get the gating part to work,but it still did the same as before.
Now there may still have been something else that needed to be hooked up that I didn't have .Or there may have been something Stan had removed to keep it from working that we don't know about ,because he never published it to prevent anyone from replicating it.
So that's about all I can say about it.I couldn't get it to work.Too much of the system had to be put into a bypas mode,that may have kept it from working,or something was still missing that we don't know about.
Don