JANUARY 1 IS THE DEADLINE FOR USING 50-kHz RADIOS
After January 1, 1997, VHF com transceivers that do not meet a frequency stability tolerance of at least 30 parts per million and that do not have 25-kHz channel spacing are no longer authorized for use. FAA Advisory Circular 90-50D explains the FAA's policy on 25-kHz spacing and the relationship to...
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