Solid state output valve

[ekjdm14]

Thanks all for the advice and suggestions. I think I've grasped the basic gist of what I'm after and have drawn up a "starter for 10" circuit using elements of the 3 designs I've seen. Waiting on a couple of resistor values & got to grab a suitable trimmer from the spares box, if I get a moment I'll draw the circuit on the computer and see if anyone can spot any "gotchas" I've fallen for. (It's just on paper at the moment, I work better with pencil/paper than Paint!

When I've got it together, regardless of if it's this design or not, I think to begin with I'll bring the set up slowly on variac & using a solid-state rectifier so I can monitor voltages and current flow on the FET circuit.

Cheers all, Dan.