Interesting... Anybody here know how many manufacturers made these vertical format suitcase sets?
A little progress... it was fairly obvious looking at the schematic that the lack of vertical deflection and inability to focus the Sentinal set could be related to an open HV divider chain. I almost jumped out of bed and went back out to the shop last night when I figured that out, but waited until this morning to find and replace a couple of 4.7 meg resisiors in the HV chain. Set now makes somewhat of a picture, and will get a full re-cap this weekend. I always prefer to start with a semi-working set, so I can judge progress, and catch errors that I might make.
jr