[dcastor]

I think I figured it out...production changes indicate that in run 5 they added a resistor not shown on the diagram 33-115339 in series with the plates of the 6J8G tube (which was also a change that I see in my radio). Thanks to Ron's handy resistor translation page, this should be a 150 ohm resistor, 1/2 watt. It actually measured at 156 ohms, so pretty close to what it should be.

Dave