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John, I think you may be right about the L705 coil. The chassis is back on the bench so I was able to more easily check the voltages at the R-Y amp. Here's what I find: The plate voltage is 217 volts (pin 1). The cathode measures right at 12 volts (pin 3). And the grid was first measured at ~ 6 volts. I decided to monitor the grid voltage for a while and after a few minutes I saw it ramp up to around 12 volts. That's not right! So with a pencil I poked around at capacitor C731 and the L705 coil. With the mechanical movement, I saw the voltage drop back to 6 volts. I was able to duplicate the voltage change again by moving L705 back and forth. Doesn't look like a bad solder joint, but I will check that carefully before trying again.
Is there a source for this peaking coil? The schematic shows "620 MU-H" as the value.
Thanks!
Wes
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