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Registered Member #146
Joined: Sun Feb 12 2006, 04:21AM
Location: Austin Tx
Posts: 1055
The schematic looks wrong, with an inverted zener, inverted bipolar transistors, and a mosfet connected just to a capacitor.
Agree'd on the zener being backwards and BJTs should be swapped. However, the fet (VT3) serves as an interrupter by disconnecting the 150V return path. I believe it's connected correctly.
Registered Member #54263
Joined: Thu Jan 15 2015, 09:54AM
Location: Perth
Posts: 35
Sorry for zener, forgot to mention: I had no symbol for TVS, so put ordinary zener, having in mind to edit it in Photoshop. Actually it is 1.5ke15 and it does not matter how to put it in schematics. About BJTs - I hardly remember actual wiring, probably you're right. VT3 is an interrupter and disconnects oscillator's GND
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