Sec. 73.510  Antenna systems.

    (a) All noncommercial educational stations operating with more than 
10 watts transmitter output power shall be subject to the provisions of 
Sec. 73.316 concerning antenna systems contained in subpart B of this 
part.
    (b) Directional antenna. No application for a construction permit of 
a new station, or change in channel, or change in an existing facility 
on the same channel will be accepted for filing if a directional antenna 
with a maximum-to-minimum ratio of more than 15 dB is proposed.

[ 42 FR 36829 , July 18, 1977]