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I use a lot of omni's... 5-10 cust each... The most radio's I have in one box is 3... one on 2.4GHz, one on 900MHz, one on 5.8GHz And one other with one on 2.4GHz, one on 5.3GHz, and one on 5.8GHz And my experience with pigtails has been the opposite... The black ones work well, the clear ones are junk... YMMV On 2/14/2011 11:45 PM, [email protected] wrote: That's just plain ignorant! 6 radios? I think the o=most I have ever attempted was 2 in one unit. I've heard too many horror stories...! Actually in this town there's another wisp using a vertical omni and a horizontal omni. Plus the town is only like 2k pop. I ran like that for the better part of a year until I finally got around to sectorizing. That only got delayed because a tower I leased space on got cut down....Chris -----Original Message----- From: Optimum Wireless Services Sent: Monday, February 14, 2011 8:25 PM To: WISPA General List Subject: Re: [WISPA] My friend's logic On Mon, 2011-02-14 at 11:59 -0600, [email protected] wrote:My experience is that with the crappy little grey or black pigtails your signal sucks. The copper braided pigtails like the Laird/Pac ones seem to do great. Not that I 'm downing Wisp-router, but they have always carried the crappy ones. I have avoided ordering any pigtails from them for quite a while so I don't know if they are still shipping those. Roc-noc, Wlanparts, Titan, to name a few always seen to ship the good copper ones. I've had 72 clients connected to a Mikrotik AP running a horizontal omni with little performance issues besides that fact that it had 72 clients on it... :) ChrisWow! 72 clients on an omni. That's impressive. Thats probably the only antenna trasnmiting around that area. I have an omni with 20 clients and get all sort of interference problems. Well, I'm glad I got a lot of explanations from the list. I WILL be printing these to show my friend. I just learned he has 6 radios installed on a RB600. How about that for self interference....-----Original Message----- From: Brian Webster Sent: Monday, February 14, 2011 10:06 AM To: 'WISPA General List' ; [email protected] Subject: Re: [WISPA] My friend's logic I agree with Fred. It's not about the number of clients that causes the problem. The physical separation of the radios is probably the key factor in the increased performance. Putting multiple radios with possibly leaky pigtails inside the same enclosure can introduce opportunities for self-interference by near field RF energies and mixing products. Unless an enclosure have been specifically designed, tested and built for that particular combination or radios and cable routing, there is no telling how it may or may not perform. Adding more radios to the MT just compounds the problem. Having the RF section outside the MT box is never a bad idea to avoid this phenomenon. Thank You, Brian Webster Skype: Radiowebst www.wirelessmapping.com www.Broadband-Mapping.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Fred Goldstein Sent: Monday, February 14, 2011 9:35 AM To: [email protected]; WISPA General List Subject: Re: [WISPA] My friend's logic At 2/14/2011 08:50 AM, OptimumWS wrote:Hello. Thought I share this with the list. I have a friend that is using MT as ap on one of his towers with his radios in 10MHz and on another tower bullets with sector panels, similar set up on both towers except for the radios. He was explaining that he finds the bullets outperforms the ubiquiti radios on the MT by far. His explanation: "The reason why bullets outperfoms the radios intalled on a router board is because of the pigtail used from the radio to the antenna. This pigtail works like a electricity cable in that the thicker the cable the more current is able to pass through so, the mikrotik pigtails are way too thin. When there is a certain number of clients connected to that radio the pigtail saturates the radio traffic because of the 'high traffic or current passing through the pigtail' and as a result; links between clients and ap can be slow and performance decreases. Now, the bullets do not have any pigtail or other connector and thats a reason why links with bullets are more stable and performs better than having a routerboard and radios with pigtails." What you guys think of his logic? Note: Posted this on dslreports wisp mainling list as well so, for those also registered to that list: sorry for the double posts.This was discussed on some vendor forums too, I think UBNTs. Most pigtails shipped with radios are too cheap for their own good. They are not properly shielded. Some WISPs have found that they can put more radios on a tower if they use better pigtails, which they either make themselves or hand-select (one person found that Laird pigtails were sometimes good, but not all of them). Pigtails can be lossy, reducing effective antenna gain, and can leak, which makes it susceptible to local interference. This has nothing to do with the number of clients, though. That's just silly. -- Fred Goldstein k1io fgoldstein "at" ionary.com ionary Consulting http://www.ionary.com/ +1 617 795 2701 ---------------------------------------------------------------------------- ---- WISPA Wants You! 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