WRT54G Linksys default antennas replace with 7 dbi antennas

Discussion in 'Wireless Internet' started by Bryce, May 10, 2005.

  1. Bryce

    Bryce Guest

    Does replacing the 2 or so dbi antennas with 7 dbi antennas do anything? Can
    I get more range?

    What affect do bigger antennas on the same power transmitter do?

    Will it go farther in my house and just have more throughput, given the same
    distances?

    Thanks.

    Bryce.
     
    Bryce, May 10, 2005
    #1
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  2. Twice as much power is 3 dB, 4 times as much power is 6 dB. You aren't
    getting quite 4 times as much power by using a 7 dBi antenna in place of
    a 2 dBi antenna.
    They will improve performance. One big advantage of investing
    in antennas is that it improves the transmit power in any given
    direction, and it also improves the receive sensitivity.
    (Unlike raising the power of the transmitter, which has to be
    done at both ends of a link to be effective, a better antenna on
    only one end of a link benefits both transmit and receive).
    Depends. If your AP and Client are sitting 20 feet from each
    other, with nothing between them, and you have a received signal
    of -40 dBm, and improvement of 5 dB to -35 dBm will have *no*
    effect. In either case the link will be able to operate at its
    maximum bitrate.

    But if your Client is two rooms away, and the signal is -83 dBm
    because it either doesn't go through the walls well or is
    actually bouncing of the metal building across the road... you
    won't be getting the maximum bit rate, and increasing the
    received signal level to -78 dBm will probably cause a higher
    bit rate, and will certainly result in fewer dropouts and
    slowdowns when things change (someone walks through your path,
    for example). And ultimately, it extends the distance at which
    you can no longer get any kind of a reliable connection.
     
    Floyd L. Davidson, May 10, 2005
    #2
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  3. Bryce

    Bryce Guest

    Floyd:

    What files do I need to update my WRT54G? I want to increase the transmit
    power somehow. Someone told me about Sveasoft. I think I'd still be below
    the point-to-point power threshhold that we need to stay below, even with
    these 7dbi antennas.

    I can't quite figure out on that Sveasoft site which firmware to download to
    flash the router with. It says it's good for Ver. 1 and Ver. 2, but I don't
    see any reference to anything being good for v3.03.1. on the WRT54G.

    Thanks for any info.

    Bryce.
     
    Bryce, May 10, 2005
    #3
  4. Bryce

    Guest Guest

    many of the third party firmwares offer power control. perhaps the
    'cleanest' is hyperwrt, which basically adds a few feautres and fixes a
    few things. it is very close to the original linksys firmware.

    that refers to the hardware revision, not the currently installed
    firmware. some custom firmwares do not yet support v2.2 and 3.0
    hardware (yet).

    also check:

    <http://www.linksysinfo.org/>
     
    Guest, May 10, 2005
    #4
  5. Sveasoft Alchemy was released before there was time to test WRT54G
    v3.0 hardware. v3.0 hardware is basically the same as v2.2 anyway.
    There have also been reports on DSLReports.com and wrt54g.com that
    Alchemy does work on the V3.0 hardware.

    See photos at:

    http://www.linksysinfo.org/modules.php?name=Content&pa=showpage&pid=6
    which states:
    "The v3.0 has no other differences from the V2.0 and V2.2 other
    than the switch that you can see to the bottom left side of the
    motherboard."

    Also, don't mix the version numbers of the WRT54G and WRT54GS. From
    the Alchemy release:
    "This version supports WRT54G V1.0, V1.1, V2.0, V2.2
    and WRT54GS V1.0, V1.1 routers only."

    ZZZZZZZZZZZZZZZZzzzzzzzzzzzzzzzzzzzzz..........
     
    Jeff Liebermann, May 10, 2005
    #5
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