[Tomcomm]

I am attempting to replace my unavailable original 21CT55's CTC2B FBX with an available CTC11, CTC16, CTC20 FBX. The new TV's horz oscillator and FBX support circuitry is completely different from the original CTC2B's. The only part that seems to be the same is the yoke. Progress so far has been encouraging. With 115vac mains, I get B++ of 396v, 170ma at the fuse, 170ma at HOT cathode, and a Boost of 840v with a minimum Ultor of 27KV. I use the new FBX to deliver chroma burst keyer and color blanking pulses which generates good chroma channel performance. Only vertical dynamic convergence is presently operating, horizontal is non operational since I still have problems with the display's horizontal fold over. No sense working to align horiz convergence until I fix the fold over.