Transmission power limits - how high? WRT54G

Discussion in 'DD-WRT Firmware' started by ydeologi, Oct 24, 2005.

  1. ydeologi

    ydeologi Network Guru Member

    What do you set the transmission power to on your modified WRT54G routers? All the way to the max, or less? If less, for what reason - local regulations? Overheating? Defective signal?

  2. vincentfox

    vincentfox Network Guru Member

    If my dorky neighbor were blasting out 900% higher signal for no good reason I would be tempted to log into their router and REDUCE it for them. Not that I would actually do such a thing.

    I live in an urban area with dozens of AP's detectable. There is little good reason for increasing transmit power as most home AP's have weak client laptops which cannot similarly boost transmit power. Increasing transmit power on the AP makes ZERO sense except it gets you more bars in some client signal-measuring utility. Big deal! The AP still cannot hear your 32 mW laptop at great distance, and WiFi needing to be 2-way you are not communicating, you are just blasting interference out into the neighborhood. Instead of a good reason TO do it, I usually mention the first reason NOT TO DO IT, which is most n00bs just increase urban background noise for no good reason.

    For most people wanting better signal, I tell them PUT A BETTER ANTENNA ON THE UNIT! A high-gain antenna increases your receive and transmit gain at the same time. You can get double or more the REAL range improvement just by plugging in a new antenna.

    Increasing transmit power makes sense to me in only one application, with point-to-point bridge units equipped with directional antenna.

    Sorry, you probably didn't deserve this tirade, but I am lugging around a soapbox today felt like standing on it.
  3. ydeologi

    ydeologi Network Guru Member

    Heh heh... no, I appreciate your tirade, and it makes sense. What do you recommend as replacement antenna for the WRT54G line, and how do you suggest improving TX/RX on a laptop with embedded WiFi or a PCMCIA or USB adapter?
  4. vincentfox

    vincentfox Network Guru Member

    I like HawkingTech products.

    Look here for a listing of their antenna:

    And I use their HWC54D card on my laptop works great:

    But I'm not a devotee, I have also used AirLink products, and professional stuff from Hyperlinktech. Just make sure whatever you buy has the right connector or includes the adapter you need. HawkingTech items come with RP-SMA on the end of the cable, and an RP-TNC adapter in the box. Most Linksys products like the WRT54G use RP-TNC, a few have RP-SMA type.

    It may be that enhanced antenna on the AP end will get you the range you need, try that first. If your AP is near the center of the house then look at medium-gain omni's. If your AP is closer to the edge of the house, why waste signal toward the street? For that I would look at directional panel or corner antenna.

    If you want to make your own, you can construct a reflector if you follow the instructions at I like the corner reflector because it's simple to make.
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