I'm back on the chassis after only a brief ~8 year break.
lotta water under the bridge since then. I got my EE degree and a job. When I got this Seville way back when I had around 10 monochrome TVs, 2 tube rectangular color sets, and 2 CTC15 clones....I now own every RCA color before the CTC-7 (2 each CTC4 and 5), Philcos first production color and Motorolas third (which even combined together are rarer than any RCA). And own or have serviced almost every RCA roundy from CT-100 to CTC-20 except the 7 and 10-12....
This resto originally went on hold due to a move and the sets apparent need for an alignment....in the mean time I have acquired sweep alignment equipment a good 21AXP22 to install, some cabinet restoration skills, a replacement CTC4 Havilland bottom board to replace the bowed one in my Seville and even a complete CTC4 director in better condition than this Seville....when I stopped working on the Seville chassis it had the tuner bracketing and shields disassembled for cleaning and rust removal (it all rerusted since then), a number of kludgy parallel caps and lousy ancient 70s NOS lytics from Chester electronics that were slightly leaky when acquired but better than the originals I also had forgotten to solder some of the AGC caps I changed.
...I also had a mishap where I stepped on the selenium rectifier and bent it to heck....
So why am I picking this basket case up? Well I was trying to get the picture to look GOOD on my CTC4 director and was leaning towards doing an alignment on it, but decided to practice on my worse Seville chassis first so if I screw up there's nothing to loose... Also I have all the extension cables stiting out to use the director as a test jig and the Seville chassis has been sitting out for almost a decade so it couldn't be easier to pick it up and start on it. So I replaced the seleniums, the percentage of lousy caps I used last time, changed the junk 2nd IF tube socket, painted the tuner brackets and IF shield an automotive gray that looks better than rust and it lived again and ran as well as it did before if not marginally better.
Before trying an alignment I went through all the resistors in the IF changing any off tolerance and that helped, then I went through the luminance channel and AGC/sync sep resistors and that really helped....color sync and demodulation was still a bit wonky though so I did the resistors there too...now it looks like I may be able to call it done soon. The 2 issues I have left are the fine tuning needing to be at max to have a good picture (I'm going to adjust the channel osc slugs) and I need to check and address the low HV issue I had years ago.
Once I get it working I'm probably going to put it in the director till I can get the director chassis as good or better. The Seville cabinet needs a lot of work and I need either a new HV cable insert for the shroud or to fix the snapped off CRT contact spring on the old one (the one in the director was broken and arcing when I got it and I swapped the Seville one into the director.
I don't want to work on the directors original chassis until I can track down 5 more good 6AZ8s and a 6AG7... The 9 pin sockets especially the IF are delicate and I only have 1 correct good spare left. If someone has those tubes and wants to sell them I'd be grateful...