D-Star Special Interest Group

The Oro Valley Amateur Radio Club "D-STAR Special Interest Group" was formed to support and engineer the addition of Digital Smart Technology for Amateur Radio to the existing OVARC communications infrastructure.  The goal of this group of dedicated Amateur Radio operators is to make the D-STAR communications technology available to OVARC club members as well as the Amateur Radio community.  The group has  installed a D-STAR UHF Repeater and Controller.  See below for details. Future plans include experimenting with new and exiting D-Star technologies and to learn how D-STAR can contribute to OVARC's public service activities.  To join the SIG and provide financial or technical support, contact Bob, KA7VPR, or send an email to This email address is being protected from spambots. You need JavaScript enabled to view it. .

Registering Your Call Sign for D-Star

OVARC does not provide a D-Star registration server.  See below for registration instructions. 

Before you can use the REFnnnx reflector features of any D-Star repeater you need to register your callsign with the US Trust servers.  If your callsign is currently registered with any D-Star system then you do not need to reregister your callsign to use the W7AI system.  To see if your call sign is currently registered go here - query.ke5bms.com.   If your callsign is not registered, go to http://www.dstargateway.org/D-Star_Registration.html for instructions on how to register your call sign.  For a step-by-step example of the registration process go to http://www.dstargateway.org/D-Star_Registration.html .  

The only registration server in the Tucson area is at:


DO NOT register your call sign with more than one registration server.  Multiple registrations will result in problems connecting to reflectors and are difficult to fix.  If you think you have registered on any other system, check query.ke5bms.com before registering your callsign a second time.

If you need to register additional terminals such as a hotspot always log in to the registration server that you used to register initally.  



D-Star Repeaters

445.800 (-5.00Mhz)  W7AI   B

Located at 11000 N La Canada DR, Oro Valley AZ 

Near Naranja and La Canada Dr

Repeater: ICOM ID-RP4000V D-STAR

Antenna: Decibel 8 Bay Folded Dipole

Power Output: 20 watts

Controller: ICOM ID-RP2C

Click here for repeater gateway status w7ai.gw.ircddb.net

The D-Star repeater and gateway are fully operational running the G4KLX ircDDBGateway software.  Coverage reports indicate great coverage from North of Saddlebrooke, South to Sahuarita, Northwest to Pinal Air Park, and West to the Tucson Mountains.   

The repeater is normally connected to REF002B.  For the PAPA system net on Thursday the repeater is connected to REF012A.  

Users of the repeater may link the repeater to other reflectors if the repeater is not busy.  Please relink the repeater to REF002B when you are finished using the other reflector.  

 445.1375 (-5.00Mhz)  KG7PJV   B

Located in north-central Tucson in the Foothills

Repeater: ICOM IC-207 receiver ICOM IC-208H transmitter

Antenna: 5db Gain

Power Output: 15 watts

Controller: Raspberry Pi B+ and DVRPTR_v1 running G4KLX ircDDBGateway and DStarRepeater software

Click here for repeater gateway status kg7pjv.ddns.net

The KG7PJV repeater is the first homebrew D-Star repeater in the Tucson area.  The repeater consists of two mobile radios and a mobile duplexer controlled by a Raspberry Pi computer with a DVRPTR_v1 GMSK modem.  The Pi runs G4KLX ircDDBGateway and DStarRepeater software on the Pidora Linux operating system.  Pidora is a remix of Fedora 20 and recompiled Raspberry Pi modules.  The repeater is currently running 5 watts output.  

This repeater is normally connected to REF002B.  Users are welcome to change reflectors to contact other hams but please return the repeater to REF002B when finished.  

 440.7625 (+5.00Mhz)  KG7RWN   B

Located Near Camino Seco and 22nd St

Repeater: Yaesu FT-7100 receiver Yaesu FT-7800 transmitter

Antenna: Decibel 8 Bay UHF vertical, 9db gain on a 90 foot tower, about 3000 ft above sea level

Power Output: 3 watts into a UHF Ampifier for 35 watts into the antenna

Controller: Raspberry Pi 2 and DVRPTR_v1 running G4KLX ircDDBGateway and DStarRepeater software

This is the second home-brew repeater created by the OVARC D-Star SIG.  It provides excellent coverage on the east and south side of Tucson. 



Repeater Listings For Your D-Star Radio

If you get a new radio or need to update the repeater listings in your existing radio, go to www.dstarinfo.com/repeater-lists.aspx.  You can download repeater listings suitable for various D-Star radios in repeater list or memory list format.  The downloaded files can be imported into the ICOM programming software or RT Systems software.  This site also has repeater maps so you can see where repeaters of interest are located.  These lists are kept up to date and include our W7AI repeater. 


Contributing to the D-Star SIG

If you would like to make a donation to contribute to the support of the D-STAR initiative, you can do so via PayPal.  Simply go the the OVARC homepage and click on the "DONATE" button at the lower right side of the home page.  Make sure to "ADD a MESSAGE" on your Pay Pal confirmation page.  Your message should include your call sign and the words "OVARC DSTAR SIG Donation" so that we may legally issue you a donation receipt for tax purposes.

If you prefer to use cash or a personal check, please contact Bob, KA7VPR, or This email address is being protected from spambots. You need JavaScript enabled to view it. .