I had a Sylvania Superset console, bought new in '79. I was in the market for a new TV and looked all over the area to find a Sylvania dealer since it had a good reputation for picture quality. Had motorized tuning and ultrasonic remote (running the vacuum cleaner in the same room would make the set change channels!) Was very happy with it with few problems, nothing I couldn't easily fix. Still in warranty the horizontal output transistor went out and was replaced by the dealer on a housecall. It went out again about a year later and I went to RatShack and got an equivalent and installed it. Cut some cooling fins out of aluminum and gooped them up with heat sink grease and that screwed to the original heat sink kept the HOT cool.
The HOT socket would get dicey so had to put some hairpin bends in the transistor leads to make contact from time to time. Pic tube went dim with heavy use after about 15 years, replaced that. Somewhere after years the tripler started to arc so scraped off the burn and coated with silicone and it worked for years more. Finally it fried so replaced it some years later. At last after 25 years regretfully said goodbye to the Sylvania and got a 36" CRT Toshiba which is Herniasville to horse around!
Reece