FCC Regulations Shaped 49 MHz as 'Nursery Frequency' for Household Wireless Devices
The 49 MHz frequency band became a common space for various household wireless devices in the U.S., including toy radios, cordless phones, and baby monitors, not due to inherent technical superiority but largely because of Federal Communications Commission (FCC) regulatory decisions. In the 1970s, the FCC moved low-power voice devices from the congested 27 MHz band to 49.82–49.90 MHz to resolve interference issues with Citizens Radio Service. Manufacturers successfully argued against a proposed ban on inexpensive super-regenerative receivers, which were crucial for keeping toy radio costs low, by demonstrating compliance with existing radiation limits. This decision allowed for the continued production of affordable devices. Subsequently, cordless phone manufacturers also began utilizing the 49 MHz band, and by the 1980s, specific channels within this band were allocated for cordless phones. By 1989, baby monitors operating on 49 MHz were explicitly discussed in FCC rulemaking, with the FCC reaffirming tha...
