Starting a Restoration on a 1951 RCA 7T111B

[Aperna1985]

I think the set does cut the tube off in phono mode. I have the chassis back in the cabinet and I have everything plugged in like it should be, I even replaced the dial light bulbs.

When the chassis was out I sprayed all the controls with contact cleaner a few times to get the gunk and dirt out then control cleaner and worked them back and forth. I think they're good.

I tested all the vacuum tubes and replaced the tired ones. My tube tester does have a plate cap, so I tested the horizontal output tube, and the high voltage rectifyer tubes.

I do have a set of test sockets that let me plug a tube in to the Tv chassis and give me tabs where I can check voltages. I don't have a scope, but I do have a DVOM that goes up to 600v.

The thing I find interesting is if I switch modes quickly I'll get a couple lines on the screen for a split second. I'm wondering if I'm not getting a negative voltage somewhere and flipping the switch is similating it?

I'm not sure if I'm looking at things the right way, but to get any kind of picture even a bad one, I need to get the horizontal running so I can get the line in the middle of the screen, then the vertical to fill the screen right?

But to get the horizontal working I need to look at the horizontal oscillator then the horizontal output? I'm trying to piece it all together from reading online and watching YouTube, and trying to find an order I should work in.