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WRT54GS and external antenna...
I need to use a Linksys WRT54GS for a wireless link of 4kms. This device has two small antennas. How do I unscrew / unmount these original antennas and to which connector do I connect my external 24dBi grid antenna? Thanks for tips on this issue best regards tor
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On Tue, 1 Mar 2005 12:16:19 +0100, "Tor Tveitane" <ep***@bushsoft.com> They just unscrew, but one of mine is stuck! There is a large blackwrote: >Hi, > >I need to use a Linksys WRT54GS for a wireless link of 4kms. This device >has two small antennas. > >How do I unscrew / unmount these original antennas and to which connector do >I connect my external 24dBi grid antenna? > >Thanks for tips on this issue > >best regards > >tor > piece that covers the actual screw in piece but the alrge black covering is hard plastic and does not get out of the way. Grab the largest part(biggest around) of the antenna and try to unscrew it. One of mine came off but as I said I cannot get the other one off. f/fgeorge wrote:
> On Tue, 1 Mar 2005 12:16:19 +0100, "Tor Tveitane" <ep***@bushsoft.com> The "large part" can be pulled off.> wrote: >>How do I unscrew / unmount these original antennas > They just unscrew, but one of mine is stuck! There is a large black > piece that covers the actual screw in piece but the alrge black > covering is hard plastic and does not get out of the way. Grab the > largest part(biggest around) of the antenna and try to unscrew it. One > of mine came off but as I said I cannot get the other one off. Thomas "f/fgeorge" <ffgeo***@yourplace.com> skrev i melding OK,news:3oq821d04eaaipmcig0mq0bqrj51t7vtjk@4ax.com... > They just unscrew, but one of mine is stuck! There is a large black > piece that covers the actual screw in piece but the alrge black > covering is hard plastic and does not get out of the way. Grab the > largest part(biggest around) of the antenna and try to unscrew it. One > of mine came off but as I said I cannot get the other one off. thanks for that info, but what about connecting ONE external antenna to TWO antenna connectors? How do I get full power out / in to the external antenna from this router?? Tor Tor Tveitane wrote:
Show quoteHide quote > "f/fgeorge" <ffgeo***@yourplace.com> skrev i melding You don't...> news:3oq821d04eaaipmcig0mq0bqrj51t7vtjk@4ax.com... > >> They just unscrew, but one of mine is stuck! There is a large black >> piece that covers the actual screw in piece but the alrge black >> covering is hard plastic and does not get out of the way. Grab the >> largest part(biggest around) of the antenna and try to unscrew it. >> One of mine came off but as I said I cannot get the other one off. > > OK, > thanks for that info, but what about connecting ONE external antenna > to TWO antenna connectors? How do I get full power out / in to the > external antenna from this router?? > > Tor There is a splitter inside that splits the output from the transmitter to the two antennas. You can either combine em back together, or open the unit up and bypass the splitter. "Peter Pan" <Marcs1102NOSPAM@HotmailNOSPAM.com> skrev i melding OK, thanks for this info. How much (in dB) do I loose if I use an external news:38jbg8F5n7eulU1@individual.net... > You don't... > There is a splitter inside that splits the output from the transmitter to > the two antennas. You can either combine em back together, or open the > unit up and bypass the splitter. combiner and where do I get a suitable such device? Thanks again for tips Tor Tor Tveitane wrote:
Show quoteHide quote > "Peter Pan" <Marcs1102NOSPAM@HotmailNOSPAM.com> skrev i melding Don't know where to get one... I have seen external antenna packs that have > news:38jbg8F5n7eulU1@individual.net... > >> You don't... >> There is a splitter inside that splits the output from the >> transmitter to the two antennas. You can either combine em back >> together, or open the unit up and bypass the splitter. > > OK, thanks for this info. How much (in dB) do I loose if I use an > external combiner and where do I get a suitable such device? > > Thanks again for tips > > Tor two antennas and go to both on the unit, and have opened my unit up to make it just one output, I was told that you can't have an impedence mismatch between the two outputs past the splitter, and there are two of em to balance things out and cut down dead spots.. Since I wanted to use an external antenna, I just tapped into the output before the splitter. "Peter Pan" <Marcs1102NOSPAM@HotmailNOSPAM.com> skrev i melding Thanks for this info. Since you have 'been there and done that'::news:38ji0iF5n5nvrU1@individual.net... > Don't know where to get one... I have seen external antenna packs that have > two antennas and go to both on the unit, and have opened my unit up to make > it just one output, I was told that you can't have an impedence mismatch > between the two outputs past the splitter, and there are two of em to > balance things out and cut down dead spots.. Since I wanted to use an > external antenna, I just tapped into the output before the splitter. What kind of connection is used between the sender and the splitter. Is it soldered or some kind of coax plug which can be 'cleanly' connected to a pigtail cable? Tor Tor Tveitane wrote:
Show quoteHide quote > "Peter Pan" <Marcs1102NOSPAM@HotmailNOSPAM.com> skrev i melding It was soldered.. I just added a mini-uhf thru the case connector, cut the > news:38ji0iF5n5nvrU1@individual.net... > >> Don't know where to get one... I have seen external antenna packs >> that have two antennas and go to both on the unit, and have opened >> my unit up to make it just one output, I was told that you can't >> have an impedence mismatch between the two outputs past the >> splitter, and there are two of em to balance things out and cut down >> dead spots.. Since I wanted to use an external antenna, I just >> tapped into the output before the splitter. > > Thanks for this info. Since you have 'been there and done that':: > > What kind of connection is used between the sender and the splitter. > Is it soldered or some kind of coax plug which can be 'cleanly' > connected to a pigtail cable? > > Tor lead and soldered it to the new output connector. somewhere on the internet are pictures of the inside of the device... I don't happen to recall the links (maybe someone here knows em, or a search can find em).. Amazing... since the advent of digital cameras there seems to be a plethora of people doing autopsies on things and posting the photos.... PS In case you are curious, they don't bleed when you cut em :) "Peter Pan" <Marcs1102NOSPAM@HotmailNOSPAM.com> skrev i melding ROTFLnews:38jj69F5n8ed6U1@individual.net... > PS In case you are curious, they don't bleed when you cut em :) I'm an electronics engineer and I'm definately not afraid of opening black boxes and modifying them. However this is a brand new box and I would just like to know a few details before I go in and break the warranty ;-) Thanks for all your info Peter Tor Peter Pan wrote:
Show quoteHide quote > Tor Tveitane wrote: Didn't find the actual autopsy photos, but there is a forum/website for >> "Peter Pan" <Marcs1102NOSPAM@HotmailNOSPAM.com> skrev i melding >> news:38ji0iF5n5nvrU1@individual.net... >> >>> Don't know where to get one... I have seen external antenna packs >>> that have two antennas and go to both on the unit, and have opened >>> my unit up to make it just one output, I was told that you can't >>> have an impedence mismatch between the two outputs past the >>> splitter, and there are two of em to balance things out and cut down >>> dead spots.. Since I wanted to use an external antenna, I just >>> tapped into the output before the splitter. >> >> Thanks for this info. Since you have 'been there and done that':: >> >> What kind of connection is used between the sender and the splitter. >> Is it soldered or some kind of coax plug which can be 'cleanly' >> connected to a pigtail cable? >> >> Tor > > It was soldered.. I just added a mini-uhf thru the case connector, > cut the lead and soldered it to the new output connector. > > somewhere on the internet are pictures of the inside of the device... > I don't happen to recall the links (maybe someone here knows em, or a > search can find em).. Amazing... since the advent of digital cameras > there seems to be a plethora of people doing autopsies on things and > posting the photos.... > PS In case you are curious, they don't bleed when you cut em :) linksys stuff (www.linksysinfo.org) and the message with the links to autopsy info http://www.linksysinfo.org/modules.php?name=Forums&file=viewtopic&t=169 (text of the page) WRT54G v WRT54GS Hardware Differences - The Autopsy Posted: Thu 17 Jun , 2004 18:59 Its been requested that we post a sticky with a link to our autopsy of the differences between the four hardware versions of the WRT54G and WRT54GS The Definitive Autospy can be found here - Autopsy: Linksys WRT54G/GS Hardware Versions Under the Knife It covers the versions: WRT54G v1 WRT54G v1.1 WRT54G v2.0 WRT54GS We hope to do the same for WAP54G when we acquire the varied units as well as compare them to the WRT54G. ____________ (note, for the actual link you have to go to the page) These are diversity antennas - which means the one with the better signal
will be used fro client - but not both at the same time. I disconnected both, and connected a new antenna just to one - it works fine. In the admin pages - you can control the config of the antennas. Go get the Linksys documentation form their web site for more info... Show quoteHide quote "Tor Tveitane" <ep***@bushsoft.com> wrote in message news:38jiahF5nmue3U1@individual.net... > "Peter Pan" <Marcs1102NOSPAM@HotmailNOSPAM.com> skrev i melding > news:38ji0iF5n5nvrU1@individual.net... > >> Don't know where to get one... I have seen external antenna packs that > have >> two antennas and go to both on the unit, and have opened my unit up to > make >> it just one output, I was told that you can't have an impedence mismatch >> between the two outputs past the splitter, and there are two of em to >> balance things out and cut down dead spots.. Since I wanted to use an >> external antenna, I just tapped into the output before the splitter. > > Thanks for this info. Since you have 'been there and done that':: > > What kind of connection is used between the sender and the splitter. Is > it > soldered or some kind of coax plug which can be 'cleanly' connected to a > pigtail cable? > > Tor > > "riggor9999" <riggor9***@invalid.yahoo.com> skrev i melding Aha, I have the sveasoft firmware, there are options for RX antenna: auto /news:J8CdnSyt9JCfCrnfRVn-1g@comcast.com... > These are diversity antennas - which means the one with the better signal > will be used fro client - but not both at the same time. > > I disconnected both, and connected a new antenna just to one - it works > fine. left / right and the same for TX antenna. Does this mean that I can set both TX and RX antenna to right and connect my external antenna to the right socket and all is well ?? Sounds too good to be true ;-) Can I have a comment on this (and how much power I loose by this method compared to opening the box and solder a connector directly to the TX output terminal). Tor
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"Tor Tveitane" <ep***@bushsoft.com> wrote: It is exactly what you can do! Or you can effectively do the>"riggor9999" <riggor9***@invalid.yahoo.com> skrev i melding >news:J8CdnSyt9JCfCrnfRVn-1g@comcast.com... > >> These are diversity antennas - which means the one with the better signal >> will be used fro client - but not both at the same time. >> >> I disconnected both, and connected a new antenna just to one - it works >> fine. > >Aha, I have the sveasoft firmware, there are options for RX antenna: auto / >left / right and the same for TX antenna. Does this mean that I can set >both TX and RX antenna to right and connect my external antenna to the right >socket and all is well ?? > >Sounds too good to be true ;-) same thing by simply removing one antenna. It will then never have the best receive signal, and therefore will never be selected for either receiver or transmit. But with any of the 3rd party firmware upgrades the antenna selection can be forced. >Can I have a comment on this (and how much power I loose by this method I see no purpose whatever in doing a hardware modification. You>compared to opening the box and solder a connector directly to the TX output >terminal). lose *nothing* by either removing one antenna or locking the switch to one or the other of the two antennas. By modifying the hardware you lose the option of easily going back to a diversity configuration at some point in the future. -- Floyd L. Davidson <http://web.newsguy.com/floyd_davidson> Ukpeagvik (Barrow, Alaska) fl***@barrow.com On Tue, 1 Mar 2005 06:11:15 -0800, "Peter Pan"
<Marcs1102NOSPAM@HotmailNOSPAM.com> wrote: >There is a splitter inside that splits the output from the transmitter to Nope. It's not a splitter, power divider, Wilkinson combiner,>the two antennas. You can either combine em back together, or open the unit >up and bypass the splitter. co-phasing contraption, or any such device. It's a switch that is part of the diversity reception circuit. The radio section is connected to only one antenna at a time. If you look at the photograph of the WRT54GS at: http://www.linksysinfo.org/modules/Content/Autopsy/WRT54GS-mblg.jpg you'll notice the traces and coax cable coming from the antennas, which converge at the switch IC. The switch is controlled by the radio which builds a table of MAC addresses and which antenna received the last complete packet from that MAC address (or other such algorithm). When not associated with any client, the radio just scans between the two antennas looking for suitable packets. With various alternative firmware for the WRT54G, the scanning can be disabled and the radio permanently connected to one antenna. It doesn't hurt to leave an outside antenna connected to one port, while the insipid rubber ducky antenna is left connected to the other. I use this arrangement at my house. The outside antenna goes to an 8dBi omni, for the neighbors to use, while the rubber ducky takes care of my laptop connections inside. -- Jeff Liebermann je***@comix.santa-cruz.ca.us 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 AE6KS 831-336-2558
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