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Tom-
The FM Decode position was intended to let just the Dolby decoder part of that deck be used with a stereo FM tuner or receiver. Apparently, for a short time period in the 1970s, some FM radio stations encoded their sound with Dolby noise reduction, and a setup like this was needed to listen to the station properly. Dolby FM stations also used 25-microsecond pre-emphasis instead of the normal 75-microsecond standard, and I saw a number of FM tuners that included a switch for that (but few if any that had the Dolby decoder built in).
This is only the second 8-track deck with Dolby noise reduction that I have seen; Radio Shack made one in the late 70s as well.
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Chris
Quote from another forum: "(Antique TV collecting) always seemed to me to be a fringe hobby that only weirdos did."
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