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
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topics were originally found in the "Articles We`d Like To See" page. They`ll be covered in this article. Additional service-related items have also been added. 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. 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...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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