[TV MAN]

Few more thoughts... Fibber says it takes 5-10 seconds for the resistor to start to smoke. Looks like an indirect heater tube, so it shouldnt start to conduct until about the 15-20 second mark, so I'd say it is immediate. Like Mike says, if this thing is passing a/c, those filter caps will act like a piece of wire. If one of those caps failed originally, it could have cooked the tube to the point it shorted. A h-k short would have to return via that resistor. Could have even melted down the tube to the point of a p-k short. Also, I havent heard mention of checking the 15ohm resistor "59". Is it open, or overheating also? Fibber, the B+ we talk about is your main power coming off your power supply to the rest of the set, (usually after the final filter cap) looks like 185v in this set.

Have you checked your speaker field coil (the coil on the back of the speaker - looks like it has one from the diagram)? If the new 84 doesnt help things, then looks like you are going to have to measure some voltages, maybe disconnect some wires (one at a time and with notes/drawings). I am quite curious what the voltages are doing in this set. This - after you have replaced the 84. Watch that new tube very carefully when you power up the radio. The only part that should "light up" is the heater/cathode, in the very center of the tube. If the outside (plates) start to glow red hot, cut the power immediatly and check for shorts, etc. Ok, my 2 cents...