Quote:
Originally Posted by Magnavox300
Yes, it's the tube in the photo closest to the HV cage.
I used Deoxit in the socket, (I don't think it was dry when I put the tube back in), and when I turned the set on, that hor. out. tube lit up very bright, then went dead.
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This is a series string set, the tube heaters are all in series adding up to line voltage, they may be divided into two strings, if you reconnected a wire in the wrong place or caused a short across part of the string it can burn out the heater on one or more of the tubes.
I believe there are several points on this set where that could happen, the heater string wiring going from one board to the next is one possibility, it also goes to the tune I think for the tubes there, if say you connected one end to ground instead of continuing on to the next tube in the string it would put extra voltage across the remaining tubes equal to the amount of the tubes left out.
In cases like this it's a good idea to install a jumper across the heater pins in the CRT socket and leave the tube disconnected until you locate the problem, you don't want to burn out that one!