Apparently it was neither:
http://www.shure.com/americas/support/find-an-answer/shure-phono-cartridge-on-the-voyager-spacecraft
Ceramic cartridges are an old relatively lo fi technology based on piezoelectric effects, rather than electromagnetic principles. They typically provide much higher output voltages than MM or MCs, and I believe they can perform more reliably than MM or MCs in the presence of severe vibration.
Regards,
-- Al
http://www.shure.com/americas/support/find-an-answer/shure-phono-cartridge-on-the-voyager-spacecraft
Ceramic cartridges are an old relatively lo fi technology based on piezoelectric effects, rather than electromagnetic principles. They typically provide much higher output voltages than MM or MCs, and I believe they can perform more reliably than MM or MCs in the presence of severe vibration.
Regards,
-- Al