If you could manage to get each radio card in its own Faraday shield you could make it work. You could put multiple router boards and cards in the same box separated by a stainless steel plumber's mesh. You have to take pains to ground the mesh to the box. The problem is de-sense to the receivers from the transmitters.
I have built a number of 2.4 "repeater" type devices with two Deliberant cards in a PAC Wireless "pocket" antenna. One is connected to the internal antenna, and the other is connected to a short "ducky" I glue to the inside of the plastic cover at the top. I use them to do site surveys. The main radio connects to the tower, and the second radio creates a "hotspot" to wirelessly connect to a laptop. I will sometimes set the main radio SSID to "any" and put the MAC of the second radio in its "do not allow" list. I keep one of these in my Jeep in case I need to make a quick connection to the Internet from hostile territory. It's amazing how many open access points a 19 dB antenna will find -- even in the small towns I frequent. Friendly Regards, Mike -----Original Message----- From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On Behalf Of Fred Goldstein Sent: Wednesday, September 01, 2010 6:46 PM To: WISPA General List Subject: Re: [WISPA] Single radio or multiple radios in the same box? At 9/1/2010 06:53 PM, Dennis Burgess wrote: >We never put more than 1 freq card in an enclosure. XR2 + XR5, that's >fine, but not two XR2s or two XR5s. Reading the forums, especially the UBNT ones, I got some ideas about what might work. Here's my recollection. Just from the look of them, the UBNT radio cards seem to have more shielding than MTs, but the MTs might have enough. One of the big problems in this case is the pigtails. The stock ones are cheap, leaky coax. One guy routinely puts multiple radios on the same band into one Routerboard, but he either builds his out pigtails out of double-shielded coax, or he uses selected Laird ones. (Some Lairds are better than others, so they need testing.) For $15-20, a real premium-quality pigtail could be a bargain. Not that I know of anyone selling them. There were also reports that the RB433 had problems that didn't show up in the RB600 or RB800. This might be that on the RB433, cards are so close together that they touch, which is bad.. One guy stuck a toothpick between the adjacent cards. The plastic UBNT antennas are somewhat leaky too; best results even with separate radios come from using RF Armor or other shields. BTW I'm doing a design now with outdoor Routerboards, and hope to have multiple cards per box, so hearing about real experience with these or other tricks is alwasy helpful. >----------------------------------------------------------- >Dennis Burgess, Mikrotik Certified Trainer >Link Technologies, Inc -- Mikrotik & WISP Support Services >Office: 314-735-0270 Website: http://www.linktechs.net >LIVE On-Line Mikrotik Training - Author of "Learn RouterOS" > >-----Original Message----- >From: wireless-boun...@wispa.org [mailto:wireless-boun...@wispa.org] On >Behalf Of Marlon K. Schafer >Sent: Wednesday, September 01, 2010 5:44 PM >To: WISPA General List >Subject: Re: [WISPA] Single radio or multiple radios in the same box? > >I gave up on using two of the same band radios in a single enclosure. >Different bands seems to work just fine and no interference issues that >way either. >marlon > >----- Original Message ----- >From: "Jeremie Chism" <jchi...@gmail.com> >To: "WISPA General List" <wireless@wispa.org> >Sent: Wednesday, August 18, 2010 4:48 AM >Subject: Re: [WISPA] Single radio or multiple radios in the same box? > > > > There was a discussion here not to long ago about interference with >using > > two radios in one rb. As I recall there is interference but someone >had a > > solution. I am sure someone will chime in or you could check the >archive. > > -- Fred Goldstein k1io fgoldstein "at" ionary.com ionary Consulting http://www.ionary.com/ +1 617 795 2701 ---------------------------------------------------------------------------- ---- WISPA Wants You! Join today! http://signup.wispa.org/ ---------------------------------------------------------------------------- ---- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
