§  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.