Is U17 an open collector inverter fed with a +12 V supply? Logic family/chip #?
Where does that signal go to the right (source of the FET)?
So far, I think it's just to ease the interfacing to a CMOS logic family, but can't tell yet.
This sure looks like a complicated beast and/or definitely high power.
The CV-8 supply here https://www.vesco-usa.com/ves-prints.html was my little baby. Quite a beast to fix. 70 Amp 3 phase input power. 15 kV at 1A shunt regulated (tube) output power.
It's basically a very high power electron beam. Think 30 KW of an electron beam sweeping in a raster pattern over a 1" diameter area or so. It was basically a work horse. Later, we had 3, with 2 operating.
We got a similar system (different manufacturer) at an auction that had three guns. All of the wires were either cut or removed when it was delivered. All they had to do was unplug a couple of "hidden connectors" and unbolt 3 High voltage cables. They chose to just cut them. It was just me to put humpty dumpty back together again. First problem - They put the wrong power source in. 100 A 3 phase 208 three wire instead of 4 wire.
Where does that signal go to the right (source of the FET)?
So far, I think it's just to ease the interfacing to a CMOS logic family, but can't tell yet.
This sure looks like a complicated beast and/or definitely high power.
The CV-8 supply here https://www.vesco-usa.com/ves-prints.html was my little baby. Quite a beast to fix. 70 Amp 3 phase input power. 15 kV at 1A shunt regulated (tube) output power.
It's basically a very high power electron beam. Think 30 KW of an electron beam sweeping in a raster pattern over a 1" diameter area or so. It was basically a work horse. Later, we had 3, with 2 operating.
We got a similar system (different manufacturer) at an auction that had three guns. All of the wires were either cut or removed when it was delivered. All they had to do was unplug a couple of "hidden connectors" and unbolt 3 High voltage cables. They chose to just cut them. It was just me to put humpty dumpty back together again. First problem - They put the wrong power source in. 100 A 3 phase 208 three wire instead of 4 wire.