[Tomcomm]

I have an RCA schematics book that covers all chassis from CTC2 thru CTC20. I zeroed in to each schematic and examined just the circuitry from the HOT thru the FBX to the output that the FBX drives. I was amazed at the lack of similarity of all their horizontal driver circuitry! It was like each year RCA had a contest among its engineers who could make the most circuitry changes from last year! This convinced me that hobbling in a look-a-like FBX from another RCA into my CTC2B was impractical and injurious to my or any other person's mental health. I am even more convinced that John’s approach of replicating the original FBX on his pro coil winder is the only way to go.

However, I will entertain the swapping-in of a different RCA FBX into my CTC2B as a far-out “plan B” backup. Has anyone in this forum performed this swap or knows of any successful swap on a early delta-gun, magnetic converged roundy? Also, are there any RCA CTC4 thru CTC20 FBX available out there, NOS or used, besides the CTC20 at Moyer?