The Set: Pete Deksnis's Site about the CT-100
Restoring a Vintage Color Television Set
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10-25-99 I just got my CRT yesterday. My chassis is rebuilt already... I also have the original RCA shop manual for this set!
10-31-99 [re: the Admiral 38A1A.] I gotta believe this is very similar to the CT-100. The only "deviant" of which I am aware is the Westinghouse. That set was a disaster that weighed half a ton. It had three chassis and an unbelievable high voltage tripler using 3A3 tubes (I think) or 1B3's. This was the heaviest TV I have ever seen. I saw it in 1966 at Williams TV in Sioux City, Iowa, when I worked there.
I have a schematic for the CT-100 (RCA original) which I would happily copy for anyone who needs it.
11-12-99 I may have access to a tube that will not likely be rebuilt.
12-10-01 I have completed the restoration of my CT-100, both electrical and the cabinet. It looks really great cosmetically and, for the most part, the picture is good too. I get a lot of smearing and was wondering if that was in the CRT or a problem in the video. Once I get time, I will hook up a video generator and look at the video waveforms at the CRT pins to get a better idea of the nature of the trouble. Also I need a "dynamic balance" pot for the purity. I also need an off/on volume knob and a better channel selector knob. Mine is missing the numbers. Nevertheless, there is a nice looking working set here in Saint Paul.
Photographed in early December 2001.
Congratulations, Gary! It's wonderful to know another Merrill can participate in the 2002 Rose Bowl parade broadcast -- a most exclusive and microscopic-size club that I hope to join soon! First step in troubleshooting a video problem like "smearing" is to check the peaking coils, especially those on the three video amp subassemblies. I've also seen jumpers across open coils -- it's a quick-fix by a slippery servicer in days gone by, or a valid troubleshooting shortcut... depends on one's side of the fence. --Pete