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Woud a disguised Cobweb work the same?

Discussion in 'Antennas, Feedlines, Towers & Rotors' started by G1YBB, Sep 8, 2015.

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  1. KC8VWM

    KC8VWM Ham Member QRZ Page

    Ok. Just seen one at walmart for like $40 buxs. 9 foot square or something. Looks like a suitable candidate. Guess you would just sew the antenna wire right into the fabric itself maybe. HOA will never know it's an antenna huh?

    Unless of course you raise the umbrella up to 30 feet. Not sure how to explain that to an HOA nazi enforcement officer exactly, but a market umbrella would be the way to go if you are doing a hidden antenna like this though. :)
     
    Last edited: Sep 11, 2015
  2. W7CJD

    W7CJD Ham Member QRZ Page

    I found a 5.5 foot, a 9 foot and a 11 foot Market Umbrella.

    They may all have eight sides. I did see some sold as Market Umbrellas with six sides.

    Is it possible to have an effective spider antenna closer to the ground?

    Maybe it could be on a tilt-mount, to have a better take-off angle while transmitting?

    The market umbrella is shown unmounted or mounted on a plain or a decorative pedestal or at the center of a table for outdoor or patio furniture.
     
    Last edited: Sep 11, 2015
  3. KC8VWM

    KC8VWM Ham Member QRZ Page

    I guess if you install a disguised market umbrella version of a Cobweb antenna on a deck that's already elevated above the ground, you can probably get the whole thing up almost 20 feet, or at least near the same height as the roof line of the house in the clear.

    Might be a bit of a compromise on 20m at that height, but on the other bands it should work fine.

    That reminds me, I once did a short video of a Cobweb antenna installed on a portable tripod on a short pole only 15 feet off the ground during some antenna tests I was doing in the past.

    This photo was taken exactly as the antenna was installed during this test.

    [​IMG]

    Despite how low it was installed above the ground as shown in the photo, here's how well the Cobweb antenna picked up stations on the 20m band:

     
    Last edited: Sep 11, 2015
  4. W7CJD

    W7CJD Ham Member QRZ Page

    Did you transmit on the Cobweb antenna?

    It would be interesting to see and hear a Market Umbrella in operation.

    If you had a condominium apartment balcony higher up.. that would be interesting to see and hear as well.

    The Market Umbrella Antenna
     
    Last edited: Sep 11, 2015
  5. W7CJD

    W7CJD Ham Member QRZ Page

    Mary Poppins?
     
    KC8VWM likes this.
  6. KC8VWM

    KC8VWM Ham Member QRZ Page

    Yes I did transmit using 5 watts into this antenna while using battery power on my FT 817

    Despite the limited power from my qrp rig, I was able to make several contacts including one who was a mobile station on 20m.

    So I thought the qrp to mobile contact was pretty good considering the limited height I was using at the time.

    Hmmm Market Umbrella Antenna. That sounds like the utimate stealth antenna for HOAs.
     
  7. AK5B

    AK5B Ham Member QRZ Page

    Heck, go ahead and put a mono or duoband hex beam under one of those larger umbrellas, even though it would too low for real directionality it still might provide a tad more gain the your favored direction.

    How would you market this antenna if you went commercial with it (ha ha hee hee hee)?
     
    KC8VWM likes this.
  8. KE0EYJ

    KE0EYJ Ham Member QRZ Page

    Just make a moxon that doubles as a laundry line pole.
     
  9. G1YBB

    G1YBB XML Subscriber QRZ Page



    this is where we went:
    San Francisco
    Alcatraz
    Golden Gate bridge
    Tram (cable car)
    Lombard Street (wiggly bit)
    Fisherman's Wharf
    Overlook of Golden Gate bridge
    Lake Tahoe
    Mono Lake (sunset)
    Bodie Ghost Town
    Yosemite village and El Capitan
    Glacier point (overlooks half dome)
    General Sherman redwood
    Moro Rock (nearby)
    Red Rock Canyon (sunset)
    Swing door saloon bar in Lone Pine
    White Mountain (road to 11,500 feet ASL)
    Ancient Bristlecone pines (4000+ years old)
    Sand dunes at Death Valley
    Zabriskie Point (Death Valley)
    Golden Canyon (Death Valley)
    Badwater basin (Death Valley)
    Dante's View (Death Valley)
    Las Vegas
    Show at Las Vegas
    Stratosphere tower jump
    Grand Canyon helicoptor trip
    Hoover Dam
    Route 66
    Grand Canyon village
    Grandview point
    Moran Point
    Lipan Point
    Navajo Point
    Desert View (sunset)
    Lower antelope canyon
    Upper antelope canyon
    Glen canyon Dam
    Lake Powell
    Gunsight Butte (sunset)
    Horseshoe bend overlook
    Pink Cliffs (Bryce Canyon)
    Natural Bridge (Bryce Canyon)
    Bryce Canyon Viewpoint
    Bryce Point (Bryce Canyon)
    Inspiration point (Bryce Canyon)
    Fisher Towers (Arches NP)
    balanced rock (Arches NP)
    porthole arch (Arches NP)
    ham rock (Arches NP)
    garden of eden (Arches NP)
    double arch (Arches NP)
    north and south windows (Arches NP)
    Delicate Arch (Arches NP) (sunset)
    Grand View Point (Canyonlands)
    Mesa Arch (Canyonlands)
    Needles overlook
    Four Corners
    Goosenecks viewpoint
    Monument Valley (sunset)
    Canyon de Chelly National Monument
    Painted desert
    Old car route 66 (near painted desert)
    Montezuma Castle
    Bell Rock (Sedona)
    Mountain Shadows Dr (Sedona)(good view of the rock)
    Airport road view point (Sedona)
    Cathedral rock viewpoint
    Route 66 museum
    Oatman town
    Joshua Tree NP
    Peggy Sue's Diner
    Calico Ghost town
    Elmore's Bottle Tree Ranch (Route 66)
    Los Angeles


    Cobweb wise, mine is in the talking about it and queue stage :)
    Now I know it's viable to have the swept up arms I can add that to the list.
     
  10. AK5B

    AK5B Ham Member QRZ Page

    Holy cow! Is there anyplace that you didn't get to along the way? I've yet to visit Calico , Bodie or Oatman the many times I've driven past them---nor have I had the pleasure of dining at Peggy Sue's.

    I wonder what Ham Rock at Arches N.P. is like? I won't even hazard a guess.

    73, Jeff
     

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