[blue_lateral]

I talked to Charles' friend tonight, and he wants me to put it back in the cabinet and see how it performs as it is before deciding how to proceed. I may also try to feed it some composite video at his suggeston. It may not be terrible, because I was able to get the chroma response fairly flat, though it seemed like I was detuning the chroma bandpass and chroma takeoff a lot to get there.

As I was rechecking it, something started smoking. It turned out to be a resistor in the plate circuit of the chroma oscillator. I pulled the shield and found one of my brand new 6gh8's arcing. D'oh! It wasnt the bandpass tube. I replaced it with a good used 6gh8. The resistor still checks ok, but I will replace it. It wasnt relavent to the alignment problem.

Leaving the direct probe attached at tp301 has no effect on the response measured at the demodulator grids.

Here is the part of the schematic where it all seems to go awry. At the output of the video detector, the response is more or less what you would expect, it falls from 3.08 to 4.08. By the time it gets to tp301 (6aw8 grid) the response is flat. r317, r318, and r326 were all pulled and checked a couple months ago, but tomorrow night I will check them again.


John