RMRL Repeaters


The Rocky Mountain Radio League, Inc. provides ten repeaters serving the Front Range. All of the analog 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. (See the Internet Connection page.) The 449.625 repeater is a Yaesu Fusion Mixed Mode Repeater (operates in both digital and analog modes). The 449.825 repeater is linked full time to the 146.940 machine, extending its coverage into Boulder and other “shadowed” areas.

Most of the RMRL repeaters require a 103.5 Hz CTCSS tone for access. The repeaters also transmit either a 103.5 Hz or a 127.3 Hz CTCSS tone. If your receiver has CTCSS decode, you can utilize this feature to reduce intermod and noise between repeater transmissions. Note that the 447.075 requires a digital code squelch, or DCS, of 165 for access and the 449.625 requires a tone of 141.3.

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 RMRL has a crossband repeater regularly flown by the Edge of Space Sciences group.


Callsign Location Output Freq. Input Freq. CTCSS
WT0C Guy Hill 145.220 MHz 144.620 MHz 103.5 103.5 Up
KE4GUQ Evergreen 145.340 MHz 144.740 MHz 103.5 127.3 Up
W0WYX Mount Mesta’ėhehe (formerly Squaw Mtn.) 146.940 MHz 146.340 MHz 103.5 103.5 Up
N0MHU Guy Hill 224.000 MHz 222.400 MHz 103.5 103.5 Up
WA0MJX Downtown Rptr 447.075 MHz 442.075 MHz DCS 165 DCS 165 Up
W0WYX Special Events Rptr 449.100 MHz 444.100 MHz 103.5 103.5 Up
K1DUN Mount Mesta’ėhehe (formerly Squaw Mtn.) 449.450 MHz 444.450 MHz 103.5 127.3 Up
KE0VH Lookout Mtn. 449.625 MHz 444.625 MHz 141.3 141.3 Up
KE0VH Lookout Mtn. 449.625 MHz 444.625 Digital FUSION Up
KI0GO Guy Hill 449.750 MHz 444.750 MHz Digital Dynamic Up
KI0GO Guy Hill 449.750 MHz 444.750 MHz Digital Static Up
W0WYX Broomfield 449.825 MHz 444.825 MHz 103.5 103.5 Up