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Originally Posted by Tom Bavis
Both FM bands means 1946-1948, there were a few broadcasting on the old band until 1948.
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Another short note on the old 42-49 MHz FM band: After the current 88-108 MHz band was commissioned following World War II and television stations went on the air, the 42-49 MHz band was slightly realigned, its frequencies becoming TV channel 1. Still later, by about the very late forties or so, channel 1 was eliminated. The 42-49 MHz band formerly used by this channel was again realigned by the FCC to 50-54 MHz, eventually becoming the radio amateur six meter band.
It is possible to hear old-style analog cordless telephones and walkie-talkies (those which operated between 46-49 MHz) on the 42-49 MHz range of any radio capable of tuning this band, including the Zenith 1948 chairside (and Tony V.'s 1947 model as well) under discussion here. These radios may also be capable of receiving baby monitor transmissions, depending on the frequencies used by the monitor.