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    PMR - radios
    Wolfgang Waldner
    • 2 min

    PMR - radios

    Personal Mobile Radio PMR radios are popular, and not without reason. The devices work at approx. 446 MHz (thus in the UHF range). They...
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    Communication underground
    Wolfgang Waldner
    • 2 min

    Communication underground

    In addition to the above-mentioned cable-supported systems, which are suitable for underground rooms, there are also "earth current"...
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    Natur, die auf Kristallglas reflektiert

    When it comes to "outdoor" adventures, it is sometimes particularly important to stay in contact - that's where the smartphone often fails.

    Testing possibilities and experimenting how you can still stay connected has become my hobby.

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