Quote:
Originally Posted by MRX37
I have a hunch.
The tube I reseated was not the HV rectifier tube. I learned from working on the Sylvania that the HV rectifier is hidden inside the flyback cage, and sure enough I found it inside the Motorola's flyback cage as well. I pulled it out and one of the pins was coated in goop. So I cleaned it and the socket with contact cleaner and put it back in. Now just waiting for the residual to dry. It's supposed to be non conductive but I always give it an hour to dry to be safe. I'll update this post with the result soon.
EDIT: Aaaand... nothing. So where's this voltage doubling cap and how do I measure B+ off it?
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You don't measure the B+ from the voltage doubler cap, you'd measure it from the first terminal of the large electrolytic cap.
If you look at the tube location diagram, you'll see the terminal points, where the focus taps are. It shows, B+, grnd and boot. Motorola always referred to boost as boot or bootstrap voltage. Be careful, measuring the boost, as I might be 1KV or higher. I wrecked a few meters checking boost voltage. Right now, all you're interested in is the B+ voltage.