Wow, I've had Tempest over five years.
Anyway, my greatest arcade fear was the monitor dying on Tempest. It basically separates the men from the children, in my mind. Everyone said that the 6100 color vector monitor goes eventually. But things have a habit of working out for me. I didn't think it would ever strike.
It struck! I lost the bottom half of the screen.
There's information, of course. Thank God for the information. The transistor at Q706 needs to be replaced.
I've learned much! Not enough to stop people on the #arcade channel at EnterTheGame to not call me a retard, but I've learned much.
Mostly, thanks to this:
http://www.repairfaq.org/REPAIR/F_VAtari6.html
I will probably start a thread and write everything in there down so we don't lose it.
I ordered a pair of 2N3716 transistors to replace the one that my readings told me isn't working right. I didn't quite get the process down for testing transistors, though. I know there are three connection points, and you test them all against each other?