2023-P-300 SHOP 


The TRXrptr serves as a highly adaptable repeater controller platform that incorporates DAC/ADC technology and essential audio filtering to enhance the overall audio quality. It seamlessly pairs with any Raspberry Pi and can automatically bypass audio/cos or PTT in the event of a power loss, guaranteeing uninterrupted operation. It also facilitates the transmission of PTT (Push-To-Talk) signals and the reception of COR (Carrier Operated Relay) or COS (Carrier Operated Signal) through GPIO. The COS detection input supports a wide voltage range, from 3 to 30V.

For user convenience, the TRXrptr package includes a Breakout board, simplifying the wiring connections for your repeater system. This Breakout board is equipped with additional trimmers that enable precise adjustment of audio settings, including gain and impedance matching.

The board has undergone successful testing with Motorola MTR2000, Hytera MD780, Kenwood MD380, and is expected to be compatible with most repeaters.

It offers an excellent solution for setting up an EchoLink/SVXLink analog repeater system.

TRXrptr Breakout


  • Raspberry Pi Pin Compatibility
  • PCB with Electroless Nickel Immersion Gold (ENIG)
  • Adjustable RX and TX Volume (via software and optional trimmers on the breakout board)
  • Incorporates Wolfson WM8960 ADC/1W DAC at 48 kHz
  • Detection of COS signal through an input signal ranging from 3V to 30V.
  • Identifies COS Signal with a Blue LED
  • Identifies PTT Signal with a Blue LED
  • Identifies AUDIO Bypass Override Signal with a Blue LED
  • Identifies PTT or COS/COR Bypass Override Signal with a Blue LED
Power consumption in combination with a Raspberry PI Zero W running SVXLink
  • Idle mode 192mA
Kit Components

While we offer the option to purchase pre-assembled devices for your convenience, kit assembly is fairly easy !

  • Logic PCB
  • Breakout PCB
  • 2 Pin Jumper
  • 40 Pin Header
  • 3x IM03TS relays
  • 4x 3 Pin Header
  • 4x 3 Pin Socket
  • 3x 2 Pin Header
  • 3x 2 Pin Jumper
  • 8x 2.5MM Torx screws
  • 8x 11m Plastic standoffs



We will upload pictures soon !