RCA 21CT55 #8802897 is Dead

[Tomcomm]

Steve, thanks for your interest in my 21CT55 reactivation. The new FBX is very efficient, delivering 32kv maximum ultor and 800v boost with B++ of 398v. Fuse current is same as HOT cathode and runs at only 174ma. B++ is limited with power resistors in the power xformer hv secondary so I can select three B++ voltages with 115vac input from my Variac: Low is 374v @ 160ma HOT, Med is 395v @ 170ma HOT, High is 420v @ 182ma HOT. After running for 3 hours at Med, FBX is bearly warm at B++ of 395v. Excessive screen width is the only major problem. All RCA's CTC7 and above have no width control. They must rely on tight spec'd parts in the Horz/EHV system to give just the right over-scan.
Your experience with using inductors to load the FBX and bleed-off drive to the yoke is consistent with my Fink '57 TV engineering handbook descriptions of width controls . Most of them were shunt where yours is series dropping. I intend to try various schemes to pull mine in.
The preliminary pics I posted above were somewhat disappointing to me. I definitely have chroma leakage in the Q channel since I don't have the proper output filter values installed. Also my camera was on AUTO and bad focus. Here's some full manual pics. The first pic is a stitch of extreme crop of new vs Sony Pro. Q chroma leakage is obvious: