S&T ARC has two amateur radio repeaters on top of the Thomas Jefferson Hall South Tower in Rolla, Missouri. These allow operators to use inexpensive handheld radios (walkie-talkies) to communicate over 60 miles away from almost anywhere inside Phelps County, and across the world if going through our internet linking systems. A Technician Class license is required to utilize them. 

VHF 2 meter Repeater: 145.450MHz - PL110.9

The VHF repeater operates on 145.450 MHz with a negative 0.600 MHz offset. A PL tone of 110.9 Hz is required. This repeater is connected to the internet via Echolink, a very cool internet-based repeater linking/conferencing system. Due to repeater hardware upgrades Echolink is currently unavailable.

VHF Repeater Coverage Map

D-STAR: W0EEE-B 448.825MHz -

The D-STAR repeater is a UHF digital repeater that allows low speed data, text and voice communication locally and to other repeaters and reflectors (conferences) via the internet. Although the entrance costs to get active with D-STAR are pretty high, the repeater still exists for community use and experimentation. It operates on 448.825 MHz with negative 5MHz offset.

To use the D-STAR repeater gateway you need to be registered. Registration is handled by our friends at the Missouri Digital Group. To register, sign up at https://user.k0mdg.net/Dstar.do. Direction available at http://www.modigitalgroup.org/images/MDG_GW_Registration_Instr_20081108.pdf

D-STAR Repeater Coverage Map

UHF 70cm DMR Repeater: 442.650MHz (+) Color Code 12

UHF DMR Repeater.

Static Talk Groups:

  • 31201 (Backyard Repeater Group - Kansas City)


  • 3129 (Missouri Statewide)
  • 31291 (Southwest Missouri)
  • 31292 (St. Louis Metro)
  • 9 (Local)

Using Other Talkgroups
In the event you would like to use another talkgroup that is on the Brandmeister network, we ask that if you want to activate any other talkgroup other than the ones listed above, please use time slot 1.  Example, if you want to talk on TG91 (Worldwide) or TG93 (North America), program your radio to use slot 1.

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