I fired this set up for the first time in months so I could compare it to another 20B1 chassis I'm currently working on.
Two problems became apparent immediately. One, the picture was barely visible. Plenty of brightness but very faint like viewing a very weak station.
Two, the horizontal linearity was shot.
I tracked the first issue down to a dirty socket for the 6AG5 RF tube in the tuner causing the filament to not light.
The second to a burned out 8500 ohm horizontal damping resistor.
That's an oddball value so I used a 10K in parallel with 56K.
That's better
