Thread: The first RCA "45" player
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Old 03-27-2018, 02:12 PM
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jr_tech jr_tech is offline
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Although these are called "program transcription" discs, they apparently are not the same as the transcription disks used by radio broadcasters, dating back to 1933:

https://en.m.wikipedia.org/wiki/Elec..._transcription

jr
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