The Motorola R100 and MCR100 Index page

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.

The UHF R100 Repeater Instruction (Service) Manual 25.4 MB PDF file donated by A. Nony Mous
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 25.5 MB). It's also similar to the MC-Micro repeater 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.

Connecting the R100 to an external controller 82kB 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.

Programming the R100 repeater 621kB PDF file
An excerpt from the Motorola R100 programming manual. This is all you will need (aside from the RSS, a real slow computer and the cable) to program the R100.

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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.
	The UHF R100 Repeater Instruction (Service) Manual 25.4 MB PDF file donated by A. Nony Mous 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 25.5 MB). It's also similar to the MC-Micro repeater 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.
	Connecting the R100 to an external controller 82kB 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.
	Programming the R100 repeater 621kB PDF file An excerpt from the Motorola R100 programming manual. This is all you will need (aside from the RSS, a real slow computer and the cable) to program the R100.