[FedCom] 173.9875

[Jack Nesmith]

5. Paired Frequency Operations. The channeling plan identifies 280 pairs of 
frequencies that are

intended to be used for two-frequency simplex operations using equipment 
operating with a necessary

bandwidth less than 12.5 kHz. The paired-use portion includes 359 channels, 
however 79 of these

channels cannot be used for paired use due to existing limitations on the 
use of one of the frequencies

that comprise these pairs (i.e., the 19 frequencies allotted for the NOAA 
weather radios, the 17

frequencies contained within the non-government sub-band 173.2-173.4 MHz, 
and 43 frequencies

designated for other specified use by US footnote)

a. For paired frequency operations, the frequencies in the range 
162.0500-166.4875 MHz will be

used for land station receive (or mobile transmit), and frequencies in the 
range 169.5125-173.9875 MHz

will be used for land station transmissions (or mobile receive).

b. Base stations with a power not greater than 125 Watts are permitted to 
transmit in the range

162.0500-166.4875 MHz for access to the repeater.

c. Mobile and base stations are permitted to use repeater transmit 
frequencies for talk-around

communications.



http://www.ntia.doc.gov/osmhome/redbook/4d.pdf