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Repeater Tower Work Photos

Discussion in 'Antennas, Feedlines, Towers & Rotors' started by N0TZU, Jun 6, 2021.

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  1. N0TZU

    N0TZU Platinum Subscriber Platinum Subscriber QRZ Page

    A few days ago at one of their repeater sites, the Northern Colorado Amateur Radio Club had to remove all their antennas from a tower scheduled for demolition and move them to another tower. I was one of the ground crew grunts and took a few cell phone photos below that may be of interest here.

    The antennas were for 70cm, 2m, 1.25m, and two microwave links. Everything was removed including the hardline feeders, but not all the re-installations were completed due to rain and lightning chasing us off the 8300 foot summit of Buckhorn Mountain.

    The largest towers on site support antennas for several FM broadcast transmitters and other services. Prior arrangements were made for the broadcasters to reduce power during the work. The very experienced climbers wore personal RF safety monitors to ensure their exposure was within safe limits and didn't climb any higher than necessary into the fields.

    The large AT&T building was one of the "Long Lines" hardened microwave sites that were built in the 1950's for long distance telephone. It had a large 24/7/365 crew to run it and maintain the equipment. Special air filtering, potable water storage, food storage and prep, electric generators, decontamination showers and so on were provided to be self sufficient for a length of time in event of nuclear war.

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    View of the site from the county road before turning onto the site road. The FM broadcast antennas at the AT&T building are on the right.


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    Starting the microwave dish removals

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    VHF antenna coming down

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    Starting up the "new" tower

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    Microwave dishes installed and UHF antenna coming up

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    Starting on cable re-installation from the new tower

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    Cable entrance inside

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    One of the great views looking toward Fort Collins on the plains. Note the burned trees.The site was almost overrun by a forest fire a few years ago.
     
    Last edited: Jun 6, 2021
    K1LH, KA0HCP, WB5THT and 10 others like this.
  2. WA9SVD

    WA9SVD Ham Member QRZ Page

    Just a "couple" of antennas there, huh?:confused: I'm with you, staying on the ground! BTW, you were VERY wise to leave when lightning threatened, even if everything was not removed initially. Better to be a live amateur radio operator:rolleyes:, than a "baked ham.:("
     
    N0TZU and KC1MRN like this.
  3. WD0BCT

    WD0BCT Premium Subscriber QRZ Page

    Thanks for the photos. Isn't it neat to actually get on a front range antenna site here in Colorado?
     
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  4. K0UO

    K0UO Platinum Subscriber Platinum Subscriber QRZ Page

    I know that site and it was very close to that fire.

    Mountaintop sites in the Western US are at work of art to us radio lovers.

    73 from,
    The K0UO " Rhombic Antenna Farm" 2 miles of wire in the air
     
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  5. WA6SW

    WA6SW Ham Member QRZ Page

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    The Verdugos, overlooking the San Fernando Valley in Burbank, CA
     
    K1LH, WB5THT, K0UO and 1 other person like this.
  6. WA6SW

    WA6SW Ham Member QRZ Page

  7. WA6SW

    WA6SW Ham Member QRZ Page

    upload_2021-6-6_21-22-28.png
     
    K1LH likes this.
  8. K1LH

    K1LH XML Subscriber QRZ Page

    Auckland VHF Group (ZL) repeater site tower, one of their sites, this one was completed in 1986. This site served as the Auckland end of a 70cm link via Mt Taranaki to Wellington - this was the beginnings of the 70cm national link, which is now a network of around 2 dozen RF linked 70cm repeaters covering most of New Zealand, map here.

    The more impressive part of this is the 2m repeater antenna system. The sets of 1/2 wave elements (marked in green) are for the 2m repeater, and are end fed. Each half wave element is DC grounded in the middle via the stand offs. Each panel including the 1/2 wave elements, and stand offs etc, is made from angle iron, welded and was hot dip galvanized as one piece. Four panels per side (total of 8) for north/south coverage.

    Voted receivers for north/south, TX power is around 40W per side to balance the performance with your typical 50W mobile, typically if you could hear it, it would hear you slightly better which made it a nice system to use, even with HTs.

    It has phenomenal gain and coverage, up-to 150 miles in each direction. During band openings it's something else..


    [​IMG]
     
    Last edited: Jun 9, 2021
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