I know some special purpose plastic enclosures made for RF work have conductive/shielding qualities to them. There's even conductive/shielding paint one can buy for RF projects. So those plastic boxes might not be as bad as you think.
Greg On Dec 3, 2009, at 10:50 AM, Josh Luthman wrote: > More along the lines of plastic enclosures versus metal enclosures. > > Josh Luthman > Office: 937-552-2340 > Direct: 937-552-2343 > 1100 Wayne St > Suite 1337 > Troy, OH 45373 > > "The secret to creativity is knowing how to hide your sources." > --- Albert Einstein > > > On Thu, Dec 3, 2009 at 10:47 AM, Robert West > <[email protected]>wrote: > >> Plastic next to the antennas??? CRAZY! So the radios pretty much talk to >> themselves a lot, huh. Hearing voices in their heads......... >> >> >> >> -----Original Message----- >> From: [email protected] [mailto:[email protected]] On >> Behalf Of Jayson Baker >> Sent: Wednesday, December 02, 2009 10:36 PM >> To: WISPA General List >> Subject: Re: [WISPA] Multiple Radio cards in an enclosure >> >> I have to laugh at one of our competitors who uses PLASTIC enclosures next >> to their antennas on the tower. Even on the most RF-jam packed sites. One >> site in particular you can almost get a fluorescent light to glow just >> holding it in your hands. And there they are with their plastic >> enclosures. And can't figure out why their system sucks ass. >> >> Oh well. They burned us for over $100k in consulting fees and equipment. >> It makes me laugh everytime I see it. >> >> On Wed, Dec 2, 2009 at 8:30 PM, Marlon K. Schafer >> <[email protected]>wrote: >> >>> I've given up on this. There is just too much cross talk. I put all >>> radios >>> in the same band in their own METAL enclosure nowadays. I try to keep >> them >>> at least 3 or 6 feet apart too. Life is much much nicer. >>> marlon >>> >>> ----- Original Message ----- >>> From: "Mike" <[email protected]> >>> To: "WISPA General List" <[email protected]> >>> Sent: Wednesday, December 02, 2009 8:13 AM >>> Subject: [WISPA] Multiple Radio cards in an enclosure >>> >>> >>>> Since I am probably one of the veterans called out yesterday for my >>>> messaging etiquette, I am changing the subject. >>>> >>>> I am interested in the multiple radios in an enclosure idea. I do >>>> have a couple with 5.8 and 2.4 gear in the same box, but have been >>>> afraid to put cards in the same band in the same case. >>>> >>>> The foil spacer you put between cards Bob, do you then ground it to >>>> create a sort of Faraday shield? I know the XRx cards do a good job >>>> of shielding if you attach the pigtail. >>>> >>>> How about the receive sensitivity on the 411 cards? Has that been an >>>> issue? I think the XR cards have better specs. Wouldn't having >>>> multiple 411 cards in the same box possibly have desense issues too? >>>> >>>> Mike >>>> >>>> >>>> At 09:41 AM 12/2/2009, you wrote: >>>>> Forgot to add, if you're concerned with any RF collisions inside the >> box, >>>>> the other thing I talked about earlier, having just 3 411 cards in >> their >>>>> own >>>>> box at the sector then running Cat5 to transparent bridge the 411's to >> a >>>>> central RouterOS device would take any of that issue totally away. >>> That's >>>>> one that I'm doing just to do it, basically. Was an idea from someone >> a >>>>> couple of months ago. (I actually listen to you guys) Had a 600a >> doing >>>>> nothing and some 411 cards "so why not play?" was my thinking. >>>>> >>>>> Bob- >>>>> >>>>> >>>>> -----Original Message----- >>>>> From: [email protected] [mailto:[email protected]] >> On >>>>> Behalf Of Mike >>>>> Sent: Wednesday, December 02, 2009 9:48 AM >>>>> To: WISPA General List >>>>> Subject: Re: [WISPA] Sectors >>>>> >>>>> Have you had any issues with putting 3 radio cards in the same >>>>> spectrum in the same box? I've thought about that but wondered if >>>>> there would be desense issues where one transmitting desensitizes >>>>> another one listening. >>>>> >>>>> >>>>> At 08:38 AM 12/2/2009, you wrote: >>>>>> Yep, looks like you're hitting the wall. We aren't lucky enough to >>> push >>>>>> 3 >>>>>> meg here, the most is usually 1 so again, all depends on your >> customer >>>>> base. >>>>>> >>>>>> I'd say if you already have 35 on that one AP, just splitting it into >> 2 >>>>>> 180 >>>>>> degree sectors will just cost you cash as soon as you gain a few more >>>>>> customers. You already have 35 pulling it down, sounds like if you >>> just >>>>>> do >>>>>> 2 180's, if split evenly (and it never will be) that would put you to >>>>>> where >>>>>> you probably want to be for smooth delivery but not much room for >> more >>>>>> growth. I'd go with 3 120's and a 433AH with 3 cards on it, one per >>>>> sector. >>>>>> I have a few like that and it works fine for what I do but again, I >>> only >>>>>> dole out 1mb per sub typically. I've also been upgrading some of my >>>>>> remote >>>>>> AP's to one 433AH with only one radio installed and an Omni. The >>>>>> anticipated upgrade path is to just add a sector or 2 and radio card >> as >>>>>> needed to the point where I have 3 sectors. Keeping the Omni of >> course >>>>>> until the third sector is needed. That's something someone already >>>>>> suggested doing and I like the economics of it. >>>>>> >>>>>> Bob- >>>>>> >>>>>> >>>>>> >>>>>> -----Original Message----- >>>>>> From: [email protected] [mailto:[email protected]] >>> On >>>>>> Behalf Of Jason Hensley >>>>>> Sent: Wednesday, December 02, 2009 9:26 AM >>>>>> To: 'WISPA General List' >>>>>> Subject: Re: [WISPA] Sectors >>>>>> >>>>>> Max 3meg - b only mode on this particular AP. Most are still able to >>>>>> get >>>>>> that, but we're seeing a decline on how many can pull 3meg. At peak >>>>>> times, >>>>>> we've seen it to where users aren't able to get much over 1meg, but >>>>>> that's >>>>>> not happening very often right now. >>>>>> >>>>>> >>>>>> >>>>>> -----Original Message----- >>>>>> From: [email protected] [mailto:[email protected]] >>> On >>>>>> Behalf Of Robert West >>>>>> Sent: Wednesday, December 02, 2009 8:23 AM >>>>>> To: 'WISPA General List' >>>>>> Subject: Re: [WISPA] Sectors >>>>>> >>>>>> Yeah, how much bandwidth are you passing to those 35 customers, >> Jason? >>>>> Just >>>>>> curious. >>>>>> >>>>>> Bob- >>>>>> >>>>>> >>>>>> >>>>>> -----Original Message----- >>>>>> From: [email protected] [mailto:[email protected]] >>> On >>>>>> Behalf Of [email protected] >>>>>> Sent: Wednesday, December 02, 2009 9:10 AM >>>>>> To: WISPA General List >>>>>> Subject: Re: [WISPA] Sectors >>>>>> >>>>>> Do you think you're hitting the limit of 802.11b/g or is it the lack >> of >>>>>> horsepower on the AP's CPU? >>>>>> >>>>>> Greg >>>>>> On Dec 2, 2009, at 8:33 AM, Jason Hensley wrote: >>>>>> >>>>>>> On this same subject, would it be better to put up 3 individual >>> AP's, >>>>>>> or >>>>>>> would something like the Deliberant Quad work well if the issue is >>> AP >>>>>>> overload. I have an AP that has 35 subscribers right now. We've >>>>>>> seen a >>>>>>> performance drop on it and are considering sectoring. >>>>>>> >>>>>>> Any thoughts on a dual (or quad) radio on a single board vs >> multiple >>>>>> boards >>>>>>> with single radios? >>>>>>> >>>>>>> >>>>>>> >>>>>>> -----Original Message----- >>>>>>> From: [email protected] [mailto: >> [email protected] >>> ] >>>>>>> On >>>>>>> Behalf Of Rick Harnish >>>>>>> Sent: Wednesday, December 02, 2009 6:28 AM >>>>>>> To: 'WISPA General List' >>>>>>> Subject: Re: [WISPA] Sectors >>>>>>> >>>>>>> Mark, >>>>>>> >>>>>>> If I remember right, you are in Missouri. I was looking for the >>>>> strength >>>>>> of >>>>>>> your omni. We have had good success with 9 db omni's in the >> Indiana >>>>>>> farmland. When we need to sectorize but the market capacity is >> not >>>>>>> that >>>>>>> high, we often go to (2) 180 Superpass 9 db sectors. We have had >>>>>>> good >>>>>> luck >>>>>>> with them over the years. They improve our signal to existing >>>>>>> clients >>>>> and >>>>>>> enable affordable expansion in rural areas. If the market will >>>>>>> justify >>>>> 3 >>>>>>> sectors, I would go that way though. >>>>>>> >>>>>>> Many of our Wireless POPs are pico-cells and we try to limit our >>>>> salesmen >>>>>> to >>>>>>> a 6 mile diameter around the tower. Although, we can often go >>>>>>> farther, >>>>> we >>>>>>> try to stay inside these guidelines when possible. To achieve a >> high >>>>>> density >>>>>>> of broadcast stations, many locations are needed. Luckily, we are >>>>>>> well >>>>>>> established in our area and have most of these sites already in >>>>> operation. >>>>>>> Your mileage may vary given your topology and broadcast site >>> density. >>>>>>> >>>>>>> Rick Harnish >>>>>>> >>>>>>>> -----Original Message----- >>>>>>>> From: [email protected] [mailto: >>> [email protected]] >>>>>>>> On >>>>>>>> Behalf Of Mark McElvy >>>>>>>> Sent: Tuesday, December 01, 2009 10:51 PM >>>>>>>> To: WISPA General List >>>>>>>> Subject: [WISPA] Sectors >>>>>>>> >>>>>>>> I am running 2.4 HPOL It has taken about 1.5 yrs to grow this AP >> to >>>>>>>> 32 >>>>>>>> subs. >>>>>>>> >>>>>>>> -----Original Message----- >>>>>>>> From: [email protected] [mailto: >>> [email protected]] >>>>>>>> On >>>>>>>> Behalf Of 3-dB Networks >>>>>>>> Sent: Tuesday, December 01, 2009 9:37 PM >>>>>>>> To: 'WISPA General List' >>>>>>>> Subject: Re: [WISPA] Sectors >>>>>>>> >>>>>>>> What frequency band and polarization? >>>>>>>> >>>>>>>> I would also strongly consider your reasoning for moving from the >>>>>>>> Omni >>>>>>>> to >>>>>>>> the sectors. If it is because your AP is overloaded so you need >> to >>>>>>>> offload >>>>>>>> some, 3 AP's might be attractive for future proofing sakes. >>>>>>>> >>>>>>>> Daniel White >>>>>>>> 3-dB Networks >>>>>>>> http://www.3dbnetworks.com >>>>>>>> >>>>>>>> >>>>>>>> -----Original Message----- >>>>>>>> From: [email protected] [mailto: >>> [email protected]] >>>>>>>> On >>>>>>>> Behalf Of Mark McElvy >>>>>>>> Sent: Tuesday, December 01, 2009 8:29 PM >>>>>>>> To: WISPA General List >>>>>>>> Subject: Re: [WISPA] Sectors >>>>>>>> >>>>>>>> 9db >>>>>>>> >>>>>>>> -----Original Message----- >>>>>>>> From: [email protected] [mailto: >>> [email protected]] >>>>>>>> On >>>>>>>> Behalf Of Rick Harnish >>>>>>>> Sent: Tuesday, December 01, 2009 7:42 PM >>>>>>>> To: 'WISPA General List' >>>>>>>> Subject: Re: [WISPA] Sectors >>>>>>>> >>>>>>>> What size omni are you using? >>>>>>>> >>>>>>>>> -----Original Message----- >>>>>>>>> From: [email protected] >>>>>>>>> [mailto:[email protected]] >>>>>>>> On >>>>>>>>> Behalf Of Josh Luthman >>>>>>>>> Sent: Tuesday, December 01, 2009 7:59 PM >>>>>>>>> To: WISPA General List >>>>>>>>> Subject: Re: [WISPA] Sectors >>>>>>>>> >>>>>>>>> That is the general suggestion - two 120s. That one guy that >> does >>>>>>>>> antenna design said so :) >>>>>>>>> >>>>>>>>> You will get some less coverage then three 120s but at the cost >> of >>>>>>>> the >>>>>>>>> extra radio/antenna it isn't cost efficient. >>>>>>>>> >>>>>>>>> On 12/1/09, Mark McElvy <[email protected]> wrote: >>>>>>>>>> I need to sector a tower that currently is an omni. I don't >>>>>>>>>> really >>>>>>>>> want >>>>>>>>>> to go to 3x 120's but find it hard to find 180's and have heard >>>>>>>> they >>>>>>>>>> don't tend to work great. I have also heard 2x 120's will work, >>>>>>>>>> any >>>>>>>>>> comments? >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> Mark >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>>>> >>>>>>>> >>> --------------------------------------------------------------------- >>>>>>>>> ----------- >>>>>>>>>> WISPA Wants You! 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