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

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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)
    93 Escort (Daily Driver)
    84 Dolphin RV (Soon to be Carputer Heaven)

  • #2
    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
    The MC of Florida Car PC Meets
    CAR:2001 Ford Crown Victoria
    PC: Acer EEE 900HA with Win7 with CF 2.0.
    Memory:1G
    Drives:160gig
    WI-FI:Cingular
    GPS:IG2k9
    Screen:Xenarc 700TSV
    The Florida Meets Thread

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    • #3
      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)

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      • #4
        I have a good range with mine, but I would like to have 1w amp.
        The MC of Florida Car PC Meets
        CAR:2001 Ford Crown Victoria
        PC: Acer EEE 900HA with Win7 with CF 2.0.
        Memory:1G
        Drives:160gig
        WI-FI:Cingular
        GPS:IG2k9
        Screen:Xenarc 700TSV
        The Florida Meets Thread

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        • #5
          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)

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          • #6
            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
            Nano ITX / 512 MB / 60 GB / Panasonic slot load / M1-ATX / Bu303 / Sound blaster 24 / PPi amps / rockford sub

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            • #7
              damn that stuff iss expensive 700 for the amp^^
              Golf 3 CarPc Status
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              PC: Slim notebook with 10.4"touch, external DVD.
              Dock for car is in production.
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              • #8
                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.
                The MC of Florida Car PC Meets
                CAR:2001 Ford Crown Victoria
                PC: Acer EEE 900HA with Win7 with CF 2.0.
                Memory:1G
                Drives:160gig
                WI-FI:Cingular
                GPS:IG2k9
                Screen:Xenarc 700TSV
                The Florida Meets Thread

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                • #9
                  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)

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                  • #10
                    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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                    • #11
                      Originally posted by GWRedDragon
                      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
                      Probably a 12v to 9v from Radioshack but we'll see how that works after testing.
                      89 Mustang (Autox, road race, and cruiser)
                      93 Escort (Daily Driver)
                      84 Dolphin RV (Soon to be Carputer Heaven)

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                      • #12
                        I take it your using a omni antenna? If your useing a directional (bi quad for example) with 1w you would be well over a mile.

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                        • #13
                          Ok, I'm going to reiterate what SAScooby said as it seems to have been ignored. Consider the following:

                          Two people are stood at opposit ends of a football field. One is talking very quietly, whilst the other is shouting. How effective is the two way communication going to be? Whilst the person shouting can give instructions to the other person, the person swisperring is not going to be able to get commands or responses back to the other end.

                          Now consider this in your Wireless Network. Your WiFi card, amp, Antenna could be so great that it could shout for miles, but if the Acess Point (AP) is only wisperring then basically your screwed.

                          Now, obviously if you own the Access Point and are able to make that thing shout too, then it's a whole different ball game.
                          06 Volvo XC90
                          Use to have installed MII 10000/512Mb/40GB, Lilliput 7", OPUS 90W, Wifi-G PCMCIA, Head Unit Aux adapter, Delorme GPS, XM PCR, Audigy NX, RR
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                          • #14
                            Originally posted by skippy76
                            Now consider this in your Wireless Network. Your WiFi card, amp, Antenna could be so great that it could shout for miles, but if the Acess Point (AP) is only wisperring then basically your screwed.
                            I am very aware of this. The true reason for getting an amp was the following: Receive Gain 17 dB typical An extra 17 dB gain is crazy.
                            89 Mustang (Autox, road race, and cruiser)
                            93 Escort (Daily Driver)
                            84 Dolphin RV (Soon to be Carputer Heaven)

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                            • #15
                              so that's how people get crazy range with their cantennas and such-amplifiers.Interesting...And I thought there was something terribly wrong with mine.

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