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Grump,
I don't think the knobs would sell. It is OK to cut the wire off the top of the probably just two tubes in there. The 6BG6 horizontal output tube, although the cap is a connector and should gently pull off leaving a wide connection pin on the top of the tube. Same with the 1B3 in the HV cage. I forgot, the 6BG6 is usefula as an audio output tube too!
Look on the tube layout chart glued inside the set if it has one to try to ID the picture tube thingy. Yes that's the big tube you look at with the long neck sticking through the deflection coils and stuff out the back. If that part of the CRT is badly damaged that will reduce the saleability. If it is just loose that should be OK if you don't try to put any twisting or pulling pressure in it. Careful handling the picture tube if you do remove it. Wear safety glasses, a heavy shirt or jacket and gloves. They are fragile and if bumped or subjected to more than moderate pressure can crack and impode throwing glass everywhere at high speed. The hardest part about removal will be getting it to slide out of the deflection coils and stuff. Sometimes they get hung up there. You may have to put a layer of black tape around thew crt socket so that it wont catch as it tries to slip through the yoke. Remove the little magnet thingy from the neck of the tube carefully before you try to remove the tube, as well as the gun connection, the plug on the very back end of the tube. You also need to remove the high voltage wire connector that is connected to a recessed well on the side of the CRT funnel. It should either pull straight off, or by bending back the rubber cover you will see that it is held in the hole by a spring cliop that can be pushed by hand to let go. Remember, gentle pressure! I'm not trying to scare you, just caution you about safe handling of the CRT. I've handled these all my life and one has never imploded on me yet.
Rob
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