Re: [WISPA] WR 900 question
Chris, We had a similar situation this week and found that our cavity filter was the cause of our problem. I have a number of the 2.5db loss filters from WR we got five years ago. None have ever been mounted outdoors. When we opened it up we found calcium deposits in the copper tuning tubes. We user CLR to clean them and re-inserted in the filters - problem gone. I had a newer .5db loss filter in an attic of one of our buildings this past summer, gets up to 150F in the attic. That filter also had calcium inside. One day all the clients started dropping off line. That one didn't appear as noise, but as signal loss. An old machine shop guy told me that aluminum would draw moisture into it over time. Having been a physicist 30 years ago, I'm not sure I believe what he said but he's been around for 50 years doing metal work. Anyone else have a thought on aluminum drawing moisture through itself into the filter. Dave Hulsebus Portative Technologies chris cooper wrote: We have a WR 900 MHz cell that saw a sudden 10 db jump in noise. Running spec ans from other towers doesn't show this rise in noise in the same band. Doing sweeps from the tower using another device, albeit 600' lower than the affected ap, we still don't see the noise floor rise, even when we run a scan pointed straight at the ap. I know we cant exactly mirror conditions at the ap from a lower altitude, but shouldn't we see some of the noise that it is reporting? Im wondering if we have a bad piece of gear up there... CPE units seem to be receiving signal as normal, but ap side is having trouble hearing them. Could wet connectors cause behavior - we had torrential rain followed by high heat. Thanks Chris ** Join us at the WISPA Reception at 6:30 PM on October the 16th 2007 at ISPCON ** ** ISPCON Fall 2007 - October 16-18 - San Jose, CA www.ispcon.com ** ** THE INTERNET INDUSTRY EVENT ** ** FREE Exhibits and Events Pass available til August 31 ** ** Use Customer Code WSEMF7 when you register online at http://www.ispcon.com/register.php ** 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/
Re: [WISPA] WR 900 question
Ehh I do not know about through it self. I do know that small spaces can will suck air (and water vapor with it) in as they do the heat/cool cycles due to pressure changes. This can be seen by leaving a kids sealed plastic toy out side for a few weeks. If you wish to test it you first have to submerge the toy for 24~48 hours in water to make sure its water tight, use cold water and pre-chill the toy in the fridge. I am curious about how well the cavity filter worked after a CLR treatment. CLR and most other such cleaners for calcium, lime, or rust are based on hydrochloric acid and do a fair job of eating metal. I found out the hard way that it can and will eat a tub drain clean through if left over night. Was the part washed and rinsed with distilled water after the cleaning? On 11/16/07, Dave Hulsebus [EMAIL PROTECTED] wrote: Chris, We had a similar situation this week and found that our cavity filter was the cause of our problem. I have a number of the 2.5db loss filters from WR we got five years ago. None have ever been mounted outdoors. When we opened it up we found calcium deposits in the copper tuning tubes. We user CLR to clean them and re-inserted in the filters - problem gone. I had a newer .5db loss filter in an attic of one of our buildings this past summer, gets up to 150F in the attic. That filter also had calcium inside. One day all the clients started dropping off line. That one didn't appear as noise, but as signal loss. An old machine shop guy told me that aluminum would draw moisture into it over time. Having been a physicist 30 years ago, I'm not sure I believe what he said but he's been around for 50 years doing metal work. Anyone else have a thought on aluminum drawing moisture through itself into the filter. Dave Hulsebus Portative Technologies chris cooper wrote: We have a WR 900 MHz cell that saw a sudden 10 db jump in noise. Running spec ans from other towers doesn't show this rise in noise in the same band. Doing sweeps from the tower using another device, albeit 600' lower than the affected ap, we still don't see the noise floor rise, even when we run a scan pointed straight at the ap. I know we cant exactly mirror conditions at the ap from a lower altitude, but shouldn't we see some of the noise that it is reporting? Im wondering if we have a bad piece of gear up there... CPE units seem to be receiving signal as normal, but ap side is having trouble hearing them. Could wet connectors cause behavior - we had torrential rain followed by high heat. Thanks Chris ** Join us at the WISPA Reception at 6:30 PM on October the 16th 2007 at ISPCON ** ** ISPCON Fall 2007 - October 16-18 - San Jose, CA www.ispcon.com ** ** THE INTERNET INDUSTRY EVENT ** ** FREE Exhibits and Events Pass available til August 31 ** ** Use Customer Code WSEMF7 when you register online at http://www.ispcon.com/register.php ** 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/ 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/
RE: [WISPA] WR 900 question
Almost ALL metal absorbs water! As soon as you put a torch on it or weld on it, you see it dry if front of your eyes. Cast steel and cast aluminum hold way more than rolled, and hardened even less... The denser the material, the less it absorbs. So don't take this wrong, but if its 'soft' it sucks. Chuck Profito 209-988-7388 CV-ACCESS, INC [EMAIL PROTECTED] Providing High Speed Broadband to Rural Central California -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jeromie Reeves Sent: Friday, November 16, 2007 4:53 PM To: WISPA General List Subject: Re: [WISPA] WR 900 question Ehh I do not know about through it self. I do know that small spaces can will suck air (and water vapor with it) in as they do the heat/cool cycles due to pressure changes. This can be seen by leaving a kids sealed plastic toy out side for a few weeks. If you wish to test it you first have to submerge the toy for 24~48 hours in water to make sure its water tight, use cold water and pre-chill the toy in the fridge. I am curious about how well the cavity filter worked after a CLR treatment. CLR and most other such cleaners for calcium, lime, or rust are based on hydrochloric acid and do a fair job of eating metal. I found out the hard way that it can and will eat a tub drain clean through if left over night. Was the part washed and rinsed with distilled water after the cleaning? On 11/16/07, Dave Hulsebus [EMAIL PROTECTED] wrote: Chris, We had a similar situation this week and found that our cavity filter was the cause of our problem. I have a number of the 2.5db loss filters from WR we got five years ago. None have ever been mounted outdoors. When we opened it up we found calcium deposits in the copper tuning tubes. We user CLR to clean them and re-inserted in the filters - problem gone. I had a newer .5db loss filter in an attic of one of our buildings this past summer, gets up to 150F in the attic. That filter also had calcium inside. One day all the clients started dropping off line. That one didn't appear as noise, but as signal loss. An old machine shop guy told me that aluminum would draw moisture into it over time. Having been a physicist 30 years ago, I'm not sure I believe what he said but he's been around for 50 years doing metal work. Anyone else have a thought on aluminum drawing moisture through itself into the filter. Dave Hulsebus Portative Technologies chris cooper wrote: We have a WR 900 MHz cell that saw a sudden 10 db jump in noise. Running spec ans from other towers doesn't show this rise in noise in the same band. Doing sweeps from the tower using another device, albeit 600' lower than the affected ap, we still don't see the noise floor rise, even when we run a scan pointed straight at the ap. I know we cant exactly mirror conditions at the ap from a lower altitude, but shouldn't we see some of the noise that it is reporting? Im wondering if we have a bad piece of gear up there... CPE units seem to be receiving signal as normal, but ap side is having trouble hearing them. Could wet connectors cause behavior - we had torrential rain followed by high heat. Thanks Chris ** Join us at the WISPA Reception at 6:30 PM on October the 16th 2007 at ISPCON ** ** ISPCON Fall 2007 - October 16-18 - San Jose, CA www.ispcon.com ** ** THE INTERNET INDUSTRY EVENT ** ** FREE Exhibits and Events Pass available til August 31 ** ** Use Customer Code WSEMF7 when you register online at http://www.ispcon.com/register.php ** 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/ 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
Re: [WISPA] WR 900 question
I should have paid more attention in chem classes. This goes down as my learned something today factoid. On 11/16/07, CHUCK PROFITO [EMAIL PROTECTED] wrote: Almost ALL metal absorbs water! As soon as you put a torch on it or weld on it, you see it dry if front of your eyes. Cast steel and cast aluminum hold way more than rolled, and hardened even less... The denser the material, the less it absorbs. So don't take this wrong, but if its 'soft' it sucks. Chuck Profito 209-988-7388 CV-ACCESS, INC [EMAIL PROTECTED] Providing High Speed Broadband to Rural Central California -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jeromie Reeves Sent: Friday, November 16, 2007 4:53 PM To: WISPA General List Subject: Re: [WISPA] WR 900 question Ehh I do not know about through it self. I do know that small spaces can will suck air (and water vapor with it) in as they do the heat/cool cycles due to pressure changes. This can be seen by leaving a kids sealed plastic toy out side for a few weeks. If you wish to test it you first have to submerge the toy for 24~48 hours in water to make sure its water tight, use cold water and pre-chill the toy in the fridge. I am curious about how well the cavity filter worked after a CLR treatment. CLR and most other such cleaners for calcium, lime, or rust are based on hydrochloric acid and do a fair job of eating metal. I found out the hard way that it can and will eat a tub drain clean through if left over night. Was the part washed and rinsed with distilled water after the cleaning? On 11/16/07, Dave Hulsebus [EMAIL PROTECTED] wrote: Chris, We had a similar situation this week and found that our cavity filter was the cause of our problem. I have a number of the 2.5db loss filters from WR we got five years ago. None have ever been mounted outdoors. When we opened it up we found calcium deposits in the copper tuning tubes. We user CLR to clean them and re-inserted in the filters - problem gone. I had a newer .5db loss filter in an attic of one of our buildings this past summer, gets up to 150F in the attic. That filter also had calcium inside. One day all the clients started dropping off line. That one didn't appear as noise, but as signal loss. An old machine shop guy told me that aluminum would draw moisture into it over time. Having been a physicist 30 years ago, I'm not sure I believe what he said but he's been around for 50 years doing metal work. Anyone else have a thought on aluminum drawing moisture through itself into the filter. Dave Hulsebus Portative Technologies chris cooper wrote: We have a WR 900 MHz cell that saw a sudden 10 db jump in noise. Running spec ans from other towers doesn't show this rise in noise in the same band. Doing sweeps from the tower using another device, albeit 600' lower than the affected ap, we still don't see the noise floor rise, even when we run a scan pointed straight at the ap. I know we cant exactly mirror conditions at the ap from a lower altitude, but shouldn't we see some of the noise that it is reporting? Im wondering if we have a bad piece of gear up there... CPE units seem to be receiving signal as normal, but ap side is having trouble hearing them. Could wet connectors cause behavior - we had torrential rain followed by high heat. Thanks Chris ** Join us at the WISPA Reception at 6:30 PM on October the 16th 2007 at ISPCON ** ** ISPCON Fall 2007 - October 16-18 - San Jose, CA www.ispcon.com ** ** THE INTERNET INDUSTRY EVENT ** ** FREE Exhibits and Events Pass available til August 31 ** ** Use Customer Code WSEMF7 when you register online at http://www.ispcon.com/register.php ** 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/ WISPA Wants You! Join today! http://signup.wispa.org/ WISPA Wireless List
