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This article is from the Antique Radios And Phonographs FAQ, by Hank van Cleef vancleef@netcom with numerous contributions by others.

41 I have an old radio-phono. The radio works fine, but the phono doesn't make any sound in the loudspeaker at all. What's the deal?

Your phono pickup probably uses a Rochelle salt crystal cartridge,
and the salt crystal has failed. You will need a new cartridge. (faq
editor note---I'm including this, and have a radio-phono with a dead
cartridge. What's available?).

 

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