RCA Flybacks

[Findm-Keepm]

Originally Posted by Kevin Kuehn

Missing the Fly 284 that was for the CTC 9 and late 7?

Yeah, I'll add it and the 352. My point was to show how different the flybacks are, and how difficult it would be to adapt one to another chassis. FLY312 and 308 look close, but if you want color, you've got to use the original. I made a mistake and put the wrong fly in once, and it wouldn't even light off. Even after swapping leads (the windings have different pinouts), I could get it to light off, but with a drive line, no color, and no AGC. 'Twas a 34-dollar mistake - had to spend that to get the correct flyback after a weeks wait.

The OP is working a CTC16 with a questionable fly - and no fly except the RCA/TRIAD/Thordarson/Hallordson exact replacement will work. Me? I'd work to prove it wasn't the fly first - by checking cathode current, 6BK4 current, and the drive to the 6JE6, as well as a swap out of the tubes with known good ones. Then, start unloading - focus rectifier, boost diode, and 3A3/cup. Good drive, good 6JE6, good cathode current, and still low HV? Probably the fly, but still plenty to check.....