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NHRC-2 Repeater Controller
Featured in the February, 1997 QST Magazine
The NHRC-2 is an inexpensive repeater controller with real stored speech and DTMF remote control. It is available assembled and tested, or as a partial kit. The partial kit contains the printed circuit board, a programmed PIC microcontroller, a MT8870 DTMF decoder, and a complete manual on CD-ROM. The manual contains ordering information for all the remaining parts needed to build the controller. Typical cost for building a NHRC-2 (including the partial kit itself) is around $60.

NHRC is pleased to present the NHRC-2 revision D Printed Circuit board! This new layout features a smaller footprint, improved power routing to the ISD chip for less noise, as well as silkscreened parts placement on the component side to simplify assembly.

[Picture of NHRC-2 Controller]
Click image to view a bigger picture.

  • 4 stored voice messages (initial ID, normal ID, timeout, and tail or courtesy beep message)
  • "Intelligent" ID algorithm.
  • 3 Operating Modes:
    • Duplex Repeater Controller
    • Simplex Repeater Controller
    • Link Controller
  • Touch-Tone remote control and programming.
  • Hang timer, ID timer, Timeout timer.
  • Extremely low power consumption.
  • Can be built for less than $60.00 (US).
Useful Information:
NHRC-2 Partial Kit Retired Product
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ISD 1420P Voice Recorder IC Retired Product
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NHRC-2 Assembled and Tested Retired Product
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