I spent some time adjusting T115 with two diddle sticks while watching the color bars, but didn't reach Nirvana. Lots of colors, but no clear path to the right ones. I think there is more going on here than mere misalignment. The lock doesn't seem very strong, either. The bars were prone to start pulsing, and tweaking the reactance coil did not always cure that in an obvious way.
I checked some voltages on V123, the 6AG7 demodulator driver:
pin 4: 0 (0 expected)
pin 5: 7.1 (6.2 expected)
pin 6: 175 (230 expected)
pin 8: 248 (280 expected)
The "expected" voltages are from the RCA schematic; the Sams manual gives lower voltages for pins 5 (5.5v), 6 (200v) and 8 (250v).
T114's secondary has continuity, measuring about 4 ohms from terminals A-B.
I checked the plate voltages of V125, the 12BH7 R-Y/G-Y demodulator:
pin 1: 33v
pin 6: 16v
I tried scoping the signal coming from T113, the bandpass transformer, and following it through the demodulator driver transformer (T114). Here is the waveform at the grid (pin 4) of the 6AG7 demodulator driver:
Here's the waveform at the plate (pin 8) of the demod driver:
Here's the waveform at terminal A of T114, the demodulator driver transformer:
And here's the waveform at terminal D of T114:
Out of curiosity, I put the frequency counter at these points. For what it's worth, it measured 3.80 MHz at the plate of the demod driver tube, 3.69 MHz at terminal A of T114, and 3.74 MHz at terminal D of T114.
Next stop: checking resistors.
Phil Nelson