Andrea CVL-16 "Tough-Dog"

[bgadow]

The dog-days come in summer, right? Well, I've spent the last month tackling some of my own "tough-dogs", sets that I've worked on before (sometimes multiple times) but eventually gave up. My track record so far is pretty good. I started with my Admiral roundie which had trouble with high cathode current, bad focus & color issues. That one turned out to be little stuff, the trickiest to find being an intermittent with the focus rectifier socket. Next up was my toughest dog of all, a 721ts that I'd been trying to get working for about 10 years. Mostly I found dumb mistakes I made when I shotgunned the recap (a B+ line running to the wrong place, etc) and one little resistor, hidden behind the vert hold pot, that was apparently shorted against something else, thus killing the vertical for all these years I've fooled with it.

Okay, time for this next challenge, an Andrea CVL-16. First, here are some shots of the schematic. I might edit some of them later as I know they aren't the best: