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.

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• 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).

• Description
• Quick Reference
• Troubleshooting information
• Frequently asked questions about assembling a partial kit
• NHRC-2 Programming Information Generator
• Complete Manual with Schematics, for Rev. E PC Board (Adobe PDF format)
• ARRL's copy of our February, 1997 QST article. (Adobe PDF format) (ARRL web membership required for access)
• Obsolete Manuals

• Microchip's web site (for PIC 16C84 data and software tools)
• ISD's web site (for ISD1420 data)
• Clare/TelTone's M8870 Data Sheet
• SGS Thompson's web site (for LM358 data)

NHRC-2 Partial Kit	Retired Product Contact Factory
ISD 1420P Voice Recorder IC	Retired Product Contact Factory
NHRC-2 Assembled and Tested	Retired Product Contact Factory
Shipping & handling charge	See Shipping Info