Must be something in the air:
Another overheated Zener in another shunt power supply!
This BZY97C is still a diode, although I didn’t test its 68 V breakdown spec. I have no idea what they’re doing with that much juice inside an X10 RF box and have nowhere near enough interest to find out.
It still doesn’t work after a Laying On of Hands: out it goes.
The Smell of Molten Projects in the Morning 