TRXrptr

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.

Datasheet

• 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 !

• 1x Logic PCB 2023-P-300
• 1x Breakout PCB 2023-BO-300
• 40 Pin Socket
• 3x IM03TS relays
• 5x 3 Pin Header
• 4x 3 Pin Socket
• 5x 2 Pin Jumper
• 4x 2 Pin Header
• 8x 2.5MM Torx screws
• 8x 11m Plastic standoffs
• 4x 2.5m hexbolt
• 2x 10k trimmer
• 2x 10uF/16v Aluminium Capacitor

Software

https://github.com/Guru-RF/SVXTRXRepeater

Assembled

We will upload pictures soon !