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no, its the CATHODE pin of the shunt tube. PIN 1
look at the 6Bk4 tube counting clockwise (from the bottom) pin 1 is the 1st pin after the key, follow any wires coming from there and see where it goes. The 1 k in question does not have to be right at the tube, you need to follow the wire that connects to the pin 1 and see where it goes, tell me where that pin 1 is connected. If it goes to a term strip, what is on the term strip., can you take a pic of the bottom of the chassis?
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