I switched back to working on this tandem the past couple days.
The power switch has been replaced with a NOS. The original was pretty gunked up inside but looks OK after a cleaning. I suspect it would work alright if I put it back in.
I also re-installed the original tuner and replaced some resistors on the IF board.
It's very handy to have two identical chassis side-by-side to compare.
For example, this set also draws about 23% less power than specified at 117 VAC (140 vs. 180 watts).
The tube filament current is dead on at 600mA. However, the B+ about 20 volts low, but the HV is fine at 14.7 kV. Cranking the line voltage up to 127 VAC got the B+ up to the specified value, but the current draw didn't go up much.
Bottom line, the set is running fine. Go figure.
Here it is without the tinted plastic cover.
Note this is
not the CRT head unit that came with set. That's packed away in storage and still needs to have the cut cable replaced.
I'm kinda dreading that task but will get to it eventually
