[jmetal88]

Alright, today I wired up that impedance matching amp. It actually made my picture far worse! I think the original input impedance on my video output tube must be much closer to the current composite video standard than other TVs of the period. I'll just keep the composite video input wired up directly, and I'll do what I can to improve the picture quality by continuing to test for out-of-tolerance resistors as well as replacing any of the old ceramic and mica capacitors which I think may be problematic. Since the tuner input exhibits the same streaking on the picture (as I discovered recently) it makes sense that the streaking isn't caused by an impedance mismatch.

EDIT: Well, the video amp does help with one thing. It makes the brightness of the picture flicker a little bit less. Unfortunately, the TV doesn't cope well with the amplified noise in the video signal and keeps losing vertical sync. The streaking in the picture is also more pronounced with the amp in place. I kind of think the brightness flickering of the picture will be lessened when I get the proper filter choke installed in the TV, as well.