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Thread: Anyone using an 802.11B amp & high gain antenna combo?

  1. #1
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    Anyone using an 802.11B amp & high gain antenna combo?

    I'm working on putting a computer together for my RV. I plan on putting a high dBi antenna and possibly an amp. Has anyone else done this? I'm talking 12-15 dBi and 500mW to 1W amp combined with an Orinoco Gold card.

    The only problem I forsee is that high dBi omni antennas have a low vertical beam width (8 degrees, such as http://www.hyperlinktech.com/web/hg2415u_pro.php). That means that if I have it raised well above the roof of the RV (which is almost 8 feet) it will be 11+ feet up. If I understand it correctly, I won't get a very good signal with closer APs correct?

    It will be used mostly for picking up distant weak signals so that really shouldn't be much of a problem right? If I do the math out correctly the beam should be at ground level after only a few hundred feet. I want to be picking up signals from at least a mile away. Running 1W on a 15 dBi antenna I should be able to get much farther than that.
    89 Mustang (Autox, road race, and cruiser)
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  2. #2
    FLAC john1701's Avatar
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    You should have a "reality range" of around 1/2 mile or more. I have the 8db antenna from hyperlink with 500mw amp with netgear pci wifi card. I have range about 1/8 mile.

    heres a pic
    www.john1701.com/mp3meet2_020.jpg
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  3. #3
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    That's the antenna I have now. I was disappointed by the lack of range with it. A 12 dBi antenna will be ~3x better than an 8 dBi. Combine that with the 1W amp (with receiving gains of ~17dBi) and I'm hoping to get signals from much father away. We will see...
    89 Mustang (Autox, road race, and cruiser)
    93 Escort (Daily Driver)
    84 Dolphin RV (Soon to be Carputer Heaven)

  4. #4
    FLAC john1701's Avatar
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    I have a good range with mine, but I would like to have 1w amp.
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    The Florida Meets Thread

  5. #5
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    I have ordered everything so I will post how it turns out. 40.5" 15 dBi antenna with a 1W amp using an Orinoco Gold card.
    89 Mustang (Autox, road race, and cruiser)
    93 Escort (Daily Driver)
    84 Dolphin RV (Soon to be Carputer Heaven)

  6. #6
    Maximum Bitrate SAScooby's Avatar
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    Since I am in the wi fi hotspot market I gotta say that remember the AP has a role to play in this as well, you may have all the power in the world on your end but if the AP is poorly setup or has poorly placed antenna then no matter what you have, your connection will be lousy
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  7. #7
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    damn that stuff iss expensive 700 for the amp^^
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  8. #8
    FLAC john1701's Avatar
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    Quote Originally Posted by SAScooby
    Since I am in the wi fi hotspot market I gotta say that remember the AP has a role to play in this as well, you may have all the power in the world on your end but if the AP is poorly setup or has poorly placed antenna then no matter what you have, your connection will be lousy
    if ya wardrivin, you can look for a stronger AP. Plus with 1w amp, he should find quite a few more AP's than I can with a 1/2 w amp.
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    The Florida Meets Thread

  9. #9
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    Quote Originally Posted by erazor
    damn that stuff iss expensive 700 for the amp^^
    Uh no. Try $260 (http://www.fab-corp.com). First one on the amp page.
    89 Mustang (Autox, road race, and cruiser)
    93 Escort (Daily Driver)
    84 Dolphin RV (Soon to be Carputer Heaven)

  10. #10
    Constant Bitrate GWRedDragon's Avatar
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    What power supply do you plan to use for that thing? Looks like it's 9v...seems to me like for a radio amplifier a clean power source would be essential

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