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BridgeCom Systems D-500 70 cm DMR and Analog Handheld Transceiver by QST

BridgeCom Systems D-500 70 cm DMR and Analog Handheld Transceiver by QST

Reviewed by Pascal Villeneuve, VA2PV
va2pv@arrl.net

D-500 Amateur DMR HTIn the past few years, VHF/UHF digital voice communication has been one of the fastest growing segments of Amateur Radio. D-STAR and System Fusion (C4FM) were specifically designed for Amateur Radio, but this is not the case with DMR — Digital Mobile Radio. It is an open standard, developed by the European Telecommunications Standards Institute (ETSI). As such, this technology is available to any company willing to build a digital radio, such as the BridgeCom Systems D-500 (by TEKK) reviewed this month. Introduction to DMR There are three types of DMR — Tier I, Tier II, and Tier III. To learn more about DMR, I strongly suggest that you read “Introduction to Digital Mobile Radio (DMR)” by John S. Burningham, W2XAB, in the October 2015 issue of QST. In this review, we will concentrate on the widespread Tier II DMR network. You will need to understand a bit about this technology to program your DMR radio. As DMR was not developed specifically for Amateur Radio, the terms are different from what we are used to. Tier II DMR uses TDMA (Time Division Multiple Access), which is a frequency-sharing protocol. You can have two conversations on the same frequency without interfering with each other. This is very efficient, as Tier II TDMA uses a 12.5 kHz bandwidth with two time slots. The switching is very fast, thus allowing for two simultaneous contacts on the same frequency, using this time-sharing method.

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BridgeCom Systems New BCD Series Duplexers

BridgeCom Systems New BCD Series Duplexers

November 14, 2015BridgeCom Systems, IncPhone: (816)532-8451 E-Mail: tim@BridgeComSystems.comContact: Tim KingFor Immediate ReleaseIntroducing the NEW BCD Duplexers by BridgeCom Systems________________________________________________________________________BridgeCom Systems, Inc is pleased to announce the availability of the BCD line of duplexers for the amateur and commercial radio markets....

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Receiver Desense Testing by Karl Shoemaker, AK2O From Repeater-Builder.com

Receiver Desense Testing by Karl Shoemaker, AK2O From Repeater-Builder.com

Receiver desense testing by Karl Shoemaker, AK2O

Introduction

Due to the inability of certain people to communicate properly and understand all the aspects of site testing this page was created to read, compare notes and build on for the benefit of all. Human communication, comprehension and understanding problems is beyond the scope of this document, however the reader should keep these problems in mind when dealing with site issues and interfacing with other companies and government Agencies. Misunderstandings, bogus readings, log entries, technician and management diagnostics and plan of actions for problem solving are commonly mis-directed with considerable time and expense wasted in the wrong direction of efforts. This can lead to the general desensitation (pun intended) and poor attitude of the workforce in most any private company or government in the technical (repair) field around this country. Fortunately, there still is a handful of technicians that care to understand what the problem is and the proper way to solve, or at least, reduce the symptoms to an acceptable figure. If you are reading this it's most like you are in one of the latter. This is a good thing.

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Becoming a Great Elmer - Our Hamstation by Fred, AB1OC

Becoming a Great Elmer - Our Hamstation by Fred, AB1OC

There is much being said and written these days about the importance of bringing new New Amateur Radio License Classpeople, especially young people, into our Hobby. There are many obvious reasons for this. As we all get older or get busy with other aspects of our lives, some will leave the hobby. Also, we have the use of many commercially valuable portions of the RF spectrum and there is always pressure to reallocate bands or segments of bands which are not fully utilized. In my mind, the most important reason to bring new HAMs into our hobby has to do with the energy and new ideas that these folks bring to Amateur Radio. Amateur Radio has always been a learning hobby and new folks help us to keep this important part of what makes our hobby so much fun vibrant.

Becoming a Great Elmer - Our Hamstation by Fred, AB1OC

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65 Great Things about Ham Radio by CQ Magazine

65 Great Things about Ham Radio by CQ Magazine

Clearly written by hams for hams. 65 great things about ham radio from CQ Magazine
BridgeCom Systems Booth Ft Wayne Hamfest 2015
1. It works when nothing else does
2. It makes you part of a worldwide community
3. The opportunity to help neighbors by providing public service and emergency communications
4. Some of the nicest people you'll ever meet
5. Some of the smartest people you'll ever meet
6. Some of the most interesting people you'll ever meet
7. Some of the most generous people you'll ever meet (along with some of the cheapest!)
8. Lifelong friendships
9. Friends around the world (including those you haven't met yet)
10. The opportunity to go interesting places you might not otherwise go to
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Get Your Ham Radio License! by WØSTU From HamRadioSchool.com

Get Your Ham Radio License! by WØSTU From HamRadioSchool.com

Get Your Ham Radio License!

You want to get your ham radio license, huh? Good! I know it can seem chaotic and confusing at first. There is a ton of jargon to cut through. A room of five ham radio operators will hold at least a dozen opinions on the best methods. Let’s get past all that.

The aim of this article for the brand new initiate is to dispense with the jargon, limit pure opinion, and provide some plain, simple, and practical information about getting started in ham radio, or how to get your ham radio license. Let’s get right to it.

How do I get a ham radio license -WG0AT Yagi

Steve WGØAT operating portable in the Rockies.

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KB6NU No-Nonsense Study Guides Now Available

KB6NU No-Nonsense Study Guides Now Available

Get the study guide that makes passing your Amateur Radio License Test EASY!  The No-Nonsense Study Guide is only what you need in an easy to read and and comprehend book.  Whether you are studying for your Technician, General or Extra Class this guide is a must! The guides are available for download in three versions: pdf, Kindle or Nook.

No-Nonsense Study Guides

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