I pulled the pto out and removed the cover (of course, this meant pretty much disassembling down to the chassis to get it out!).
There was no zener inside -it had been clipped out. I couldn't find any obvious bad parts using a stereo microscope, so I re-flowed the solder on the board wherever I could and I moved the external zener onto the B side of the board and soldered it in. It seems more stable but it's still jumping a little. I've noticed I can get it to jump frequency when I wiggle the brass shaft that holds the slug. It also jumps some when I wiggle the cover. How loose should that brass rod be with respect to the hole in the end of the coil? There's definitely some free play there. Steve Wedge, W1ES/4 To be is to do - Socrates To do is to be - Plato Do be do be do. - Sinatra All my computers have my signature with various pearls of wisdom appended thereto.
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