The UDRC-II Enables D-STAR on Many Repeaters

In case you missed the updates on the UDRC Wiki, there are now examples of adding D-STAR using the UDRC-II on many different repeaters:

Universal Digital Radio Controller

Yaesu DR-1X (currently available directly from Yaesu on a special promotion)

Kenwood TKR-750/850

Bridgecom Repeaters (including the 220 band)

Homebrew Systems

Use the message board to share your repeater and hotspot implementations using the UDRC or UDRC-II

If you can get at the discriminator and true FM modulator of a repeater, the UDRC-II gives you a way to add D-STAR.

4 Responses to The UDRC-II Enables D-STAR on Many Repeaters

  1. Ron Wright, N9EE says:

    I wonder if this unit has delay of data. Seems all it is doing is repeating the data which does work. I’ve been doing with GE Mastr Exec II using DSTAR Repeater Controller (DRC) from Advanced Repeater Systems for about 4 years. The DRC does have about 250 ms delay, a needed feature to allow the repeater to come up before transmitting the data or one will loose the initial call sign of users in the header.

    Is easy to get rcvr data from discrementator, but must use direct FM for xmtr data. And with ICOM rigs proper deviation, 1.25 kHz as read on dev meter on service monitor, is critical or most ICOM rigs will not decode well. xmt data must be clean with no over shoot.

    I’ve also done with MSR2000.

    • John Hays says:


      The delay is configurable and can be optimized for XMTR ramp up time.

      — John

      • Ron Wright, N9EE says:

        It would be good to add the delay feature with some info to the description of the UDRC-II.

        thanks, ron

      • John Hays says:

        The delay feature is set in the dstarrepeater configuration file. For example, for a UDRC, the value is set for


        The value is in milliseconds.

        For more detailed discussions and documentation, please visit the UDRC Group