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The Rocky Mountain Radio League, Inc. owns and operates ten repeaters at sites along the Front Range of Colorado to serve its membership. All of the repeaters are based on a standard design employing General Electric MASTR II exciters, power amplifiers, and receivers, and S-COM Industries controllers. The design allows components to be exchanged between repeaters and a spare inventory the club maintains. A defective component can be easily 'swapped out', minimizing repeater downtime and eliminating the need for on-site repairs under adverse conditions.

Certain of the RMRL repeaters offer special features. The 145.340 machine is a node in the Internet Radio Linking Project (IRLP) network. This repeater can be linked to other repeaters around the world via the Internet. The 449.750 machine is the club’s experimental repeater, and also provides digital paging capability. The 449.825 repeater is linked full time to the 146.940 machine, extending it’s coverage into Boulder and other "shadowed" areas. The 449.875 machine has an emergency locater transmitter (ELT) receiver which alerts listeners of potentially downed aircraft.

The 70 cm repeaters require a 103.5 Hz CTCSS tone for access. The 2 meter and 220 MHz repeaters normally don't require CTCSS but may if interference is being received. Using the CTCSS tone will bypass a 1-second transmit delay that is programmed into each repeater's controller. The repeaters also transmit the 103.5 Hz CTCSS tone. If your receiver has CTCSS decode, you can utilize this feature to reduce intermod and noise between repeater transmissions.

The 145.220 and 224.000 MHz repeaters have autopatch capability

which supports long tone zero (LiTZ) emergency calling. The telephone line is shared between the two repeaters and may be in use at any given time. If you attempt to dial a number while the line is in use, the repeater will transmit 'BZ' (busy) in Morse code. The 146.940, 449.450, and 145.430 MHz repeaters have autopatches that can only be used to contact the Colorado State Patrol (CSP) in emergency situations. This is done by using the 911* or long tone zero (LiTZ) codes. The CSP is equipped to connect you to any other public assistance agency.

View the RMRL Repeater Operational Guidelines

Callsign Location Output Freq. Input Freq.
WN0EHE Guy Hill 145.220 MHz 144.620 MHz
N0PQV Evergreen 145.340 MHz 144.740 MHz
N0MQJ Eldorado Mtn. 145.430 MHz 144.830 MHz
W0WYX Squaw Mtn. 146.940 MHz 146.340 MHz
N0MHU Guy Hill 224.000 MHz 222.400 MHz
  W0LGF West of Sedalia 449.125 MHz 444.125 MHz
WB5YOE Squaw Mtn. 449.450 MHz 444.450 MHz
N0TI Guy Hill 449.750 MHz 444.750 MHz
W0WYX Broomfield 449.825 MHz 444.825 MHz
N0MHU Eldorado Mtn. 449.875 MHz 444.875 MHz


Copyright 2007 Rocky Mountain Radio League, Inc. Denver, Colorado  USA