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This Weekend ONLY: Use code ULTRABONUS or MICBONUS to grab a FREE Ultra Codeplug w/ a Plug and Play Purchase OR FREE Speaker Mic with your 878UVII+ Purchase! Just add both items to your cart!
This Weekend ONLY: Use code ULTRABONUS or MICBONUS to grab a FREE Ultra Codeplug w/ a Plug and Play Purchase OR FREE Speaker Mic with your 878UVII+ Purchase! Just add both items to your cart!

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BridgeCom Official Blog

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  • Unlock Priority Zones with a Custom Key!
    November 8, 2023 Ron Kochanowicz

    Unlock Priority Zones with a Custom Key!

    Discover how to access your prioritized zones with ease in our upcoming video. We'll guide you through setting up a custom key that puts you in control, making your communication more efficient and precise. Join us to unlock the power...

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  • Mastering Keypad Control on Your AnyTone Radio!
    November 8, 2023 Ron Kochanowicz

    Mastering Keypad Control on Your AnyTone Radio!

    Unleash the full potential of your AnyTone radio by mastering keypad control. Our video is your guide to effortlessly lock and unlock the keypad, providing you with ultimate control and ease of use. Join us to become a keypad pro,...

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  • Dayton Hamvention 2017 Reflection
    May 31, 2017 Tim King

    Dayton Hamvention 2017 Reflection

    What can I say about Dayton Hamvention 2017 other than WOW! It had everything; Great venue, 30,000 of your favorite ham radio friends, great vendors, Rain, Rain, and more Rain, good food, great buys, mud and on-site camping. Did I...

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  • Amateur Radio Linking Explained
    April 20, 2017 Tim King

    Amateur Radio Linking Explained

    Amateur Linking What is amateur radio linking and why is it so important, necessary, or just plain fun? Let's say you want to set up a repeater at Hamvention and talk to the group back home. How is that possible?...

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  • BridgeCom Systems D-500 70 cm DMR and Analog Handheld Transceiver by QST
    March 30, 2017 Tim King

    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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