Sec. 15.217  Operation in the band 160-190 kHz.

    (a) The total input power to the final radio frequency stage 
(exclusive of filament or heater power) shall not exceed one watt.
    (b) The total length of the transmission line, antenna, and ground 
lead (if used) shall not exceed 15 meters.
    (c) All emissions below 160 kHz or above 190 kHz shall be attenuated 
at least 20 dB below the level of the unmodulated carrier. Determination 
of compliance with the 20 dB attenuation specification may be based on 
measurements at the intentional radiator's antenna output terminal 
unless the intentional radiator uses a permanently attached antenna, in 
which case compliance shall be demonstrated by measuring the radiated 
emissions.