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Oh no , The selenium didn't short , if it did , you'd know it .
It's highly likely that a wax paper capacitor did short , taking out one of the small resistors after the selenium , and making it go silent . I have the 8 tube model of that chassis with the "propeller dial" and on mine a bunch of the caps were disc and checked out fine so I left em but anything wax paper was either open (almost all of em) , shorted (a couple) and I replaced the electrolytics and the selenium with a silicon diode just for good measure as well (I left the disconnected selenium in place for future generations to marvel at) . Are you recapping these radios or just plugging them in as found ? As the very last 1960s tube gear rolls on up to 50 years old there are no wax paper caps in anything I get that I don't replace .
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