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KOMA upgraded from 5,000 to 50,000 watts in early 1947.
KOMA upgraded from 5,000 to 50,000 watts in early 1947.
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WLS, Chicago, advertisement promoting its March 29, 1941, move from 870 to 890 kHz
WLS, Chicago, advertisement promoting its March 29, 1941, move from 870 to 890 kHz
Radio dealer advertisements soliciting customers needing help in resetting the mechanical push buttons on their console receivers.
Radio dealer advertisements soliciting customers needing help in resetting the mechanical push buttons on their console receivers.