25v vs Roundie

[dieseljeep]

Originally Posted by DaveWM

one thing I could do is review my GE tab book. IIRC the GE designed roundie chassis had a tacked on board that converted the roundie to a 23v. I think it was just the tacked on board that was added and the rest of the chassis was exactly the same.

The was more to it than that.
The flyback was different, to satisfy the different sweep angle. The old roundie had a 70 degree sweep and the 23V had a 90 degree sweep. The board that was added was a pincushion corrector circuit.
It's apparent in all the CTC15 clones, that were built for the rectangular CRT's. The pincushion corrector circuit was added and the flyback was changed to accommodate the wider sweep angle.