In Mr Popper’s Penguins — one of the newest films out this summer — young Tommy Popper communicates with his father using what many reviews are calling ham radio. But while the Poppers are using a radio tuned to 21.2460 (15 meters SSB), this frequency was not available to US hams as a phone frequency in the 1976-78 time period, as shown in the movie. Neither do the Poppers use call signs. Ins…
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