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NHRC-2.1 Repeater Controller
An Inexpensive Repeater Controller
with Real Stored Speech
The NHRC-2.1 is the latest generation of of NHRC's popular NHRC-2 Repeater Controller. The NHRC-2.1 offers many improvements over the NHRC-2, including a fan control output, LEDs to display input and output status, and many new programming features.

The NHRC-2.1 continues the long standing tradition set by the NHRC-2. It has a tremendous amount of functionality packed in a design with a very low parts count, resulting in exceptional reliability at an affordable price.

The controller is programmable by sending DTMF sequences. The CW ID, hang time, ID timer, timeout timer and tail message counter can all be programmed by the user. All programming is password-protected, and is stored in non-volatile EEPROM memory.

Just like the NHRC-2, the NHRC-2.1 is available as a partial kit you can build in your own workshop. All the parts are through-hole, and it can be assembled with common electronics hand tools. The partial kit includes the printed circuit board and all four ICs. Complete documentation is below.

[Picture of NHRC-2.1 Controller]
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  • Easily integrates with any repeater.
  • Four user-recordable, non-volatile voice messages for duplex mode, each up to 10 seconds long:
    • Initial ID Message
    • Normal" ID Message
    • Timeout Message
    • Tail Message
  • Simplex Repeater Controller mode.
    • Plays CW or Voice ID.
    • Stores up to 40 Seconds of speech.
  • CAS, CAS and CTCSS, CAS or CTCSS and DTMF Access Modes
  • "Intelligent" ID algorithm.
  • Dedicated Fan Control/Digital output.
  • Four Programming Commands.
  • 29 Control Operator Settings.
  • Five saved setups.
  • Touch-Tone remote control and programming.
  • Hang timer, ID timer, Timeout timer, Fan Timer, and CW messages stored in non-volatile memory.
  • Receiver audio gating allows use of non-squelched receiver audio.
  • Jumper-selectable receiver deemphasis.
  • LED CAS, CTCSS, PTT, and DTMF indicators. LEDs can be disabled for low-power applications.
  • Connector for optional NHRC-DAD Digital Audio Delay, to fully mute DTMF and help eliminate Squelch Crashes.
  • European ID mode supports 1750 hertz tone burst and European ID rules.
    (Requires external 1750 hertz decoder.)
  • Extremely low power consumption.
NHRC-2.1 Repeater Controller
with Real Stored Speech
Partial Kit (PCB and all ICs)
NHRC-2.1 Repeater Controller
with Real Stored Speech
Assembled and Tested
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