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"have the Sam's Photofact for the radio"
If you are looking at the Photofact, you may wonder how 250 volts (or so) gets to the end of the 500 ohm pot. The schematic shows the end of the pot connected to pin 4 of the output tubes, but omits the connection of these points to the power supply at the right end of the choke...oops!
jr
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