Well, I spoke too soon. Jumpering around the coil did not change anything. And, I suppose the mechanical movement thing was a coincidence. Guess I'm in too big a hurry to track down the problem!
Did some more testing last night and I see that there are some other voltage changes going on:
When the grid of the r-y amp jumps from 6 volts to 12 volts, I also see a decrease in the plate voltage (pin 1) from 217 volts (normal) to 167 volts.
Also see a slight increase in the plate voltage of the 12AZ7 "X" demod. It normally runs 260 volts and jumps to 272 volts.
These jumps in voltage are a gradual ramp-up or ramp-down over about 5 seconds.
I checked most of the resistors in the area of the r-y amp and they are all within spec. Should I be thinking about recapping the chroma section as a start?
(Remember, I have the troubleshooting skills of a beginner
)
Thanks!
Wes