The Motorola R100 and MCR100 Index page

The R100 & MCR100
Repeater Station Page
Maintained by Robert Meister WA1MIK

An Overview of the R100 Repeater Station By Robert W. Meister WA1MIK
Describes the station components and various interfacing signals. You definitely want to read this article before shopping for an R100 station.

Adding a PL Disable Switch to the R100 Repeater Station By Robert W. Meister WA1MIK
Many stations don't have the components installed for this feature. It's easy to do, and for under $2.00 you wonder why Motorola just didn't do it in the first place. This article describes the procedure.

Replacing the R100 Code Plug EEPROMs By Robert W. Meister WA1MIK and Bernard Barink AJ4SX
The serial EEPROMs used in these stations will go bad some day. The original ICs are no longer available but we've found some suitable substitutes. This article describes what you need to go through in order to replace them with new ones.

R100 Code Plug Information Compiled by Robert W. Meister WA1MIK from information provided by Bernard Barink AJ4SX
Documentation of the code plug information stored in the radio's serial EEPROMs.

R100 JAUX Interfacing Information By Robert W. Meister WA1MIK
A summary of the JAUX connector and interface board signals. Useful if you want to connect an external repeater controller to your R100, or if your station does not have the JAUX and interface board installed (not all did).

Modifying an R100 to operate with an external repeater controller By Ken Cechura KC9UMR
Ken's station did not have the JAUX or its wiring, so he had to find all the signals the old-fashioned way. This is his experience.

The UHF R100 Repeater Instruction (Service) Manual 26 MB PDF file
This is the no-longer-available 6881078E15-O manual. The R100 repeater was based on the German MCR100 unit, and that radio's manual is also no longer available except here... 6881071E50-A (this PDF is also about 26 MB). It's also similar to the MC-Micro repeater (about a 20 MB PDF file) which is / was available in a factory 220 MHz split.
A note on the R100 ‑ it's built for either carrier squelch / PL or carrier squelch / DPL and can't be switched without replacing the main CPU chip, and that is no longer available as a spare part. I've heard horror stories from hams that bought surplus R100s that were configured for DPL and wanted to put them into amateur service with PL... If you have a DPL model that you want to use on PL just program the repeater as a carrier squelch duplex base station and use a TS32 or similar PL decoder, then run the COR and PL decode lines to a repeater controller that has both inputs, then combine them in that controller.

The MC Compact Base Station and Repeater Theory/Maintenance Manual 60 MB PDF file
This covers all four of the European band splits. It was most likely scanned by Eric WB6FLY and uploaded but for some reason it never got added to this index file.

Connecting the R100 to an external controller 82 kB PDF file
A tech writeup from Connect Systems Inc describing how to connect an R100 to their TP-154 panel. It's written well enough that the information is adequate to connect any other brand: ICS, Link, NHRC, Scom, etc.

The RSS Manual for the R100 repeater 840 kB PDF file
The complete Motorola R100 RSS (programming) manual, converted from a PDF file, cleaned up, and turned back into a PDF file. This is all you will need (aside from the actual software, a real slow computer and the cable) to program the R100.

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Hand-coded HTML © Copyright 2009 and date of last update by Robert W. Meister WA1MIK.
See the Contact Information on this site's main index page.
This page created 21-Jul-2009 by moving the info from the main Motorola page.

This web page, this web site, the information presented in and on its pages and in these modifications and conversions is © Copyrighted 1995 and (date of last update) by Kevin Custer W3KKC and multiple originating authors. All Rights Reserved, including that of paper and web publication elsewhere.

	An Overview of the R100 Repeater Station By Robert W. Meister WA1MIK Describes the station components and various interfacing signals. You definitely want to read this article before shopping for an R100 station.
	Adding a PL Disable Switch to the R100 Repeater Station By Robert W. Meister WA1MIK Many stations don't have the components installed for this feature. It's easy to do, and for under $2.00 you wonder why Motorola just didn't do it in the first place. This article describes the procedure.
	Replacing the R100 Code Plug EEPROMs By Robert W. Meister WA1MIK and Bernard Barink AJ4SX The serial EEPROMs used in these stations will go bad some day. The original ICs are no longer available but we've found some suitable substitutes. This article describes what you need to go through in order to replace them with new ones.
	R100 Code Plug Information Compiled by Robert W. Meister WA1MIK from information provided by Bernard Barink AJ4SX Documentation of the code plug information stored in the radio's serial EEPROMs.
	R100 JAUX Interfacing Information By Robert W. Meister WA1MIK A summary of the JAUX connector and interface board signals. Useful if you want to connect an external repeater controller to your R100, or if your station does not have the JAUX and interface board installed (not all did).
	Modifying an R100 to operate with an external repeater controller By Ken Cechura KC9UMR Ken's station did not have the JAUX or its wiring, so he had to find all the signals the old-fashioned way. This is his experience.
	The UHF R100 Repeater Instruction (Service) Manual 26 MB PDF file This is the no-longer-available 6881078E15-O manual. The R100 repeater was based on the German MCR100 unit, and that radio's manual is also no longer available except here... 6881071E50-A (this PDF is also about 26 MB). It's also similar to the MC-Micro repeater (about a 20 MB PDF file) which is / was available in a factory 220 MHz split. A note on the R100 ‑ it's built for either carrier squelch / PL or carrier squelch / DPL and can't be switched without replacing the main CPU chip, and that is no longer available as a spare part. I've heard horror stories from hams that bought surplus R100s that were configured for DPL and wanted to put them into amateur service with PL... If you have a DPL model that you want to use on PL just program the repeater as a carrier squelch duplex base station and use a TS32 or similar PL decoder, then run the COR and PL decode lines to a repeater controller that has both inputs, then combine them in that controller.
	The MC Compact Base Station and Repeater Theory/Maintenance Manual 60 MB PDF file This covers all four of the European band splits. It was most likely scanned by Eric WB6FLY and uploaded but for some reason it never got added to this index file.
	Connecting the R100 to an external controller 82 kB PDF file A tech writeup from Connect Systems Inc describing how to connect an R100 to their TP-154 panel. It's written well enough that the information is adequate to connect any other brand: ICS, Link, NHRC, Scom, etc.
	The RSS Manual for the R100 repeater 840 kB PDF file The complete Motorola R100 RSS (programming) manual, converted from a PDF file, cleaned up, and turned back into a PDF file. This is all you will need (aside from the actual software, a real slow computer and the cable) to program the R100.