Ctc-9

[Electronic M]

Originally Posted by mr_rye89

Yeah I haven't checked the chroma oscillator yet, just the burst amp tube. I need to get it in the house so I can feed it a good signal (or buy a test pattern generator) I gotta fix the lift gate on my truck before I can get it in the house lol

And the jug is obviously baaaaaked, it's a 21cyp22a, and a rebuild at that. If anyone here wants to sell me a compatible replacement, I'm all ears

Honestly the CRT looks good in the pictures. Purity adjustment is miles off which is something that must be addressed before worrying about color circuits (you have to have a really good B&W picture including purity before you can have a decent color picture).
My rule is if it's acceptably bright without a brightener run it, and if it needs a brightener use it up on that brightener and look for a better tube as it slowly dies.

All the 21" roundy color tubes are interchangeable with grayscale adjustments (which have to be done when swapping CRTs anyway)....the only caveat being the metal cone 21AXP22 can't go into a newer set designed for a 21CYP, FBP/FJP/GUP/GVP22 because newer sets lack insulation in their mounting provisions. 19V roundy tubes (21" tubes relabeled because of changes in measurement laws) are also interchangeable.

[mr_rye89]

Good to know. I got it in the house and fed it a good signal, the sweep looks good, good H/V linearity/lock. I'm having trouble with purity but it's been a while since I've worked on a color set. There's also weird sounds around the yoke like somebody's cooking popcorn in there, I can't see any arcing, and the vertical jumps a bit when making that sound. I may pull the yoke and inspect it for anything weird

[mr_rye89]

I added pictures to the imgur gallery. Did purity setup but havent done convergence yet. color all the way down gives an ok b&w image, color mid way gives psychedelic color bars, all the way goes blurry. The color control didn't do anything before purity setup, I also tweaked the color killer threshold to see if that would wake anything up. I think cleaning all the pots is my next step. I wanna get all the low hanging fruit first.

Also sams for this one is on ETF

https://imgur.com/a/rca-ctc-9-wR7NEXy