The AA5RO Repeater

The Alamo Area Radio Organization (AARO) maintains four repeaters:

Medical Center Area Cross Band FM Repeaters

147.380 MHz (+ offset & 162.2 Hz PL tone)
443.875 MHz (+ offset & 162.2 Hz PL tone)

The 2m and 70cm machines are linked together, providing cross-band 2m-70cm/70cm-2m operation as well as the normal 2m-2m and 70cm-70cm operation.

The 2m and 70cm repeaters are manufactured by Bridgecom Systems and have a 100% duty cycle rating at a full 50 Watts. NOAA Weather Radio Alert is automatically rebroadcasted on the 2 meter side of this system when severe weather alerts are issued. Silver and Amber Alerts are not.

Nets take place on these linked repeater Mondays, Wednesdays, Saturdays and Sundays. See the Net Section for list of AARO sponsored nets.


151 and West Over Hills FM/Digital Repeaters  

147.320 MHz MMDVM Repeater running C4FM, D-Star, and DMR modes
444.850 MHz (+ offset & 162.2 Hz PL tone & Mixed Mode with Wires X)

Tone-Sql is Suggested 70cm repeater and Digital use on the 2 meter Repeater

The 70 cm repeater is manufactured by Yaesu and operates on Automatic Mode Select (AMS / Mixed Mode) that are capable to operate in either FM or Digital modes. The equipment was donated by club members in March of 2015. The repeater is linked with Wires-X and is open to the public to go to His/Hers preferred room for about 30 minutes until the link resets itself.

The 2 Meter  Repeater is a  Yaesu System Fusion repeater is with MMDVM (Multi Mode Digital Voice Modem) that operates in a Digital Only Modes. The MMDVM allows the repeater to operate in C4FM, D-Star, and DMR Digital Modes. This repeater supports APRS.

DMR Mode the Repeater Uses:

Color Code: 1

Time slot 2 is used for local/regional Talk Groups

TG 2 is for Local Communications (Non-Networked)

Time slot 1 is used for National/World Wide Talk Groups

We ask that your RX List should include TG 2 in every Channel/TG programmed so your can receive Emergency or Priority Traffic.

D-Star Mode the Repeater Uses:

YOUR: CQCQCQ or your reflector of choice

RPT1: AA5RO C

RPT2: AA5RO G

MY: <your callsign>

System Fusion (C4FM) Mode the Repeater Uses:

Standard DN & WV modes. It also has it’s own version of Wires -X that will allow you to connect to a YSF Reflector.

Both Repeaters are Yeasu System Fusion DR1X repeaters.


All four repeater frequency pairs are fully coordinated in the club’s name and callsign. Anyone with a technician class or higher HAM license can use any of these machines and adhere to AARO Repeater Rules posted below.

It’s only through our fund-raising activities and membership support that our Board of Directors have the resources necessary to upgrade our repeater systems. It’s thanks to you that AARO’s club treasury is capable of permitting us to put your dollars back to work for you in this way to support this great avocation.

Repeater Rules: Link to Repeater Rules