Motorola Radius R100 (and MCR100) UHF Repeater (RT) Station Overview Motorola® Radius® R100 (and MCR100) UHF Repeater (RT) Station Overview By Robert W. Meister WA1MIK This article provides an overview of the R100 and MCR100 UHF repeaters. All of the information came from physical examination of the station and running the programming software, as well as the R100 Instruction (and service) Manual, p/n 6881078E15 and the MCR100 Instruction (and service) Manual, p/n 6881071E50. The following specific questions and topics were originally found in the 'Articles We'd Like To See' page.

Motorola Radius R100 (and MCR100) UHF Repeater (RT) Station Overview. Manual, p/n 6881078E15 and the MCR100 Instruction (and service) Manual. If you've got one that isn't here, email us the info and we'll add it to the list! The DXZone.com 1 links about motorola radius m110.

They'll be covered in this article. Additional service-related items have also been added.

Question or Topic Answer Moving a Motorola R100 repeater from commercial to amateur frequencies, including RSS screen shots and interfacing it to an external repeater controller. Hex-edit the software, program and tune the radios. Read further for interfacing suggestions. What manual part numbers are the correct ones to order? Manuals are No Longer Available and cannot be ordered. PDF files are posted on Repeater-Builder.

What knowledge would someone familiar with the R100 radios wish they had before they got into them (like the fact that the R100 can do either PL or DPL, but not both, and changing from one to the other requires replacing the controller board), and enough information that listings on eBay make sense? The model number is about all you can go by, along with a photo of the insides to make sure the unit is physically complete. Parts to convert PL to DPL or vice versa are No Longer Available.

An interfacing article would be very welcome: how to hook up an external controller, how to get muted receiver audio out of the radio, along with COR and PL decode, and how to insert transmit audio into it, along with PTT and how to control the transmitter PL encoder. Read further for details and interfacing suggestions. The repeater is stuck transmitting all the time. C894 in the RPTR DROP-OUT DELAY circuit is shorted. Insufficient A+ voltage and can't adjust A+ voltage.

One or more diodes bad in the power supply bridge rectifier or the main filter cap is bad. General Overview and Features: As far as anyone can tell, the R100 and MCR100 are identical stations. The MCR100 was manufactured for the European market and there are more options listed in the MCR100 manual. All parts are interchangeable and have identical specifications. Throughout this write-up, the R100 product name will be used to refer to either or both stations. The radio modules used in these repeaters are based on the MC Micro product line, which was probably a predecessor to the MaxTrac/Radius mobile radios. There is evidence in the manuals that these stations were available for the VHF mid-band (72-76 MHz), VHF high-band (136-174 MHz) and UHF (403-433 and 450-470 MHz) bands. Mercurius Homeopathic Software Crack Sites more.

European models covered 66-88, 136-162, 146-174, 403- 433, 422-450, 438-470 MHz ranges. Also, the receiver radio could be used by itself as a full transceiver in base-station applications. The transmitter radio in my station had two coax cables plugged into it: one for the transmitter RF output and one for the receiver RF input (from the antenna switch in the power amplifier).

I suspect the receiver jack on the RF board is just there to hold the cable. The European market calls this an MC Compact station.

It was available in 68-88, 136-174, 174-225, and 403-470 MHz versions, with power ranges of 1-6, 1-10, or 25 watts. The R100 is a full-duplex, intermittent-duty, wall-mounted UHF repeater station composed of a receiver, transmitter, power supply, and control board. A duplexer is not contained in the package; one must be provided externally. They come in several variations or configurations: • Power Level: 2-10 watts or 25 watts (European: 1-6, 1-10, or 25 watts) • Coded Squelch: PL (most common) or DPL (rare) (not both), plus Carrier • Remote Control: Tone (wire-line) / Desktop Console, or None In most cases, it is NOT possible to alter this configuration without replacing major assemblies. For example, the repeater control board won't have the parts installed on it for control tone decoding if it wasn't originally configured or ordered that way.

Similarly you would need to replace the RF Power Amplifier to get more output power. Worst, however, is that the transmitter and receiver are built to do either Private-Line (PL) or Digital Private-Line (DPL), but not both. You can't change from one to the other without replacing the microprocessor (No Longer Available) and a few other parts on the radio's control board; these parts are documented in the manual. The encoding (in the transmitter) and decoding (in the receiver) is performed by the microprocessor on the respective unit's control board. Both the receiver and transmitter are capable of one single operating frequency (or channel), although there is evidence that two channels were possible in some configurations. The transmitter and PA are designed for wide-band coverage; the only item that needs tuning after being reprogrammed is the VCO. Deviation must be checked or adjusted after programming.