CTC-4 Director 21

[Hagstar]

I wasted a lot of time on my CTC-4 thinking Hickok tested meant something. Indeed failure to work as a chroma amp or intermittent shorts weren't always detected. Tubes are cheap enough, and those 6U8s and AZs are considered expendable under such heavy use. I just order NOS (usually Sylvania or GE) for all critical tubes for any color set so old and keep the old ones for emergency/if they work spares.

[SwizzyMan]

I'll look around for any shorted wires, but my next order of business is to figure out how to get rid of the interference when the chroma signal comes in. It makes the picture unwatchable. I also have a bit of artifacts on the black and white signal now. I may just shotgun replace all resistors on the video board for good measure, but the chroma signal interference might be a different story.

[SwizzyMan]

Got a new oscillator crystal courtesy of Phil Nelson (Thanks a bunch). I got it awhile ago in fact. I just haven't had time to get back to the set until this weekend. Hopefully replacing the bad crystal will clear up some problems. It's been almost a year working on this set and i've still got a ways to go.