Even after the recap and almost complete overhaul of the 17TV7C last summer the set began to progressively lose vertical hold control until it's at a point now where after about five minutes it doesn't matter where the knob is, it won't lock. All of the resistors between the vertical output tube were previously replaced by me. The vertical hold pot and a few original resistors remained as they were within tolerance. Tube also checked good last I plugged it in the Sencore. What baffled me more was I pulled the chassis out to poke around and change out another two resistors just in case and I couldn't get it to lose vertical like it normally it did. There was still a bit of touching the hold up but otherwise it remained rock solid for the eight or so hours I left it tuned into MeTV. Turned it on again last night to watch Murdoch Mysteries and nope, unwatchable after a few minutes.