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Originally Posted by Einar72
I'd hold off on any more power-on testing until you have a schematic. Otherwise, if the flyback goes, you'll have the most expensive potted-plant-stand in town! If someone locally is soaking you big bucks for EH tubes, you may be in a town big enough to have a library. Go to the main branch and ask the reference/periodicals or technology desk if they have Sams' Photofacts. They usually keep them out of sight, but the index is at their fingertips. Your TV should be in there. You could also Google Sams' and plug-in your model# into Sams' online-search page.
I'd look for a glowing plate on any tube, especially the horizontal output, damper and those new 5U4's. In fact, I'd put the old ones back in until you have this all sorted out. Some of us old farts are rightly suspicious of fleece-the-musician re-branded Chinese/Soviet Bloc tubes like EH (I do own one of their fuzzboxes, however, with no tubes). You'd be better off finding some sturdy old JAN surplus 5U4 or 5R4's on ePay and give them a good home!
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I had the 5u4EH's laying around from an amplifier i no longer own. I already inquired with my library about photofacts, the first time the librarian said they had them but no longer allowed people to access them. This was two years ago. I went in about two weeks ago and asked again. They now tell me they threw them out because they were tired of looking for someone to take them, all
three filing cabinets full. Lets just say I wasn't pleased.