Wireless microphone frequency band fcc1/25/2024 And while the worked, they never sounded very good. The problem was that the AFC would also respond to a stronger frequency and it was commonplace to hear police or taxi cab transmissions in the middle of an event. The receiver had a strong Automatic Frequency Control (AFC) circuit to track the drifting transmitter. These units had a much smaller transistorized transmitter but the main problem was that the transmitter was not crystal controlled. Those of us of a certain age remember-and not too fondly- the Vega systems from the 1960s. Stated battery life was four hours but it took a strong person to hold that transmitter for that long a time! It weighed six pounds and had handles on both sides of the 11” high x 4 1⁄2” wide x 3 1⁄2” transmitter. The oldest example I’ve found is an “RCA RADIOMIKE” Type BTP-1A from about 1950. WIRELESS MICROPHONESĪ wireless microphone is nothing more than a small radio frequency transmitter and it has been around for a long time. In order to understand what is happening with the UHF television band and how it has an impact on the use of this band for wireless microphones, one needs to take a look at several different aspects of the situation. The Radio Frequency Spectrum Puzzle Part 2īy Bill Ruck, San Francisco Broadcast Engineer
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