I second Justin's advice. If you must use Shielded Ethernet, you will need to ground it to the tower every 20-30 feet. That means pealing back the plastic sheath and wrapping a small cable ground kit around the shielding, water proofing and then attaching the ground strap to the tower. Make sure the tower grounding system is adequate and no ground loops exist between your building and the tower. After all the effort and expense in labor and equipment, it would probably be cheaper to run fiber. It will also prevent flaky issues from arising in the future if the weather proofing fails.
The radio station will need to turn down or turn off the equipment while this work is being done. Respectfully, Rick Harnish Executive Director WISPA 260-307-4000 cell 866-317-2851 WISPA Office Skype: rick.harnish. [email protected] From: [email protected] [mailto:[email protected]] On Behalf Of Justin Wilson Sent: Friday, January 21, 2011 2:52 AM To: [email protected]; WISPA General List Subject: Re: [WISPA] AM Tower Question My advice is to run fiber if you must use the tower. So the whole tower is not charged? Most AM towers are the antenna themselves. This means as you add equipment you will have to re-proof the tower as you have changed the radiation pattern of the tower. I am hoping your climbers have RF monitors or the owner has really turned down the power for you as you climb. Justin -- Justin Wilson <[email protected]> Aol & Yahoo IM: j2sw http://www.mtin.net/blog - xISP News http://www.twitter.com/j2sw - Follow me on Twitter Wisp Consulting - Tower Climbing - Network Support _____ From: Scott Carullo <[email protected]> Reply-To: <[email protected]>, WISPA General List <[email protected]> Date: Fri, 21 Jan 2011 01:55:40 -0500 To: <[email protected]> Subject: [WISPA] AM Tower Question I ran a shielded shireen ethernet cable up a tower today about 50-60 feet maybe, the cable itself was maybe twice that length to run into a building. While the cable was being hoisted up I was holding the end and it got so hot I had to let go. There is an AM antenna running up the side of the tower and its about 10KW from what I was told. I am going to assume there is no way to successfully run ethernet up this tower, I know others have tried and warned me it would not work but I had to see for myself... I believe it now :) We do have power (standard outdoor SOOJ type cable 14/3) cable running to a box 150 feet or so up there. Ethernet runs from the box are about 5-15 feet max. Mostly unshielded indoor cat5 (I inherited this and have not switched out yet). Any way the power works fine and the radios and cabling have been there for years and is also fine. My question - I was told the power didn't work until a wise old man put a choke/filter of some sort on the power cable when it entered the box at 150ft. I want to run a new cable and put up a new box, but I'd like to not climb the tower and figure out what wise old man used. I'd rather know and have my new box ready for the beating before raising it up there. I usually use power filters on all our tower boxes (noise filter/supression unit on incoming power like Square D Surgelogic type LC power filter / surge protection 5 amp 120v). Is this going to handle the AM problem or do I need something more specialized? Thanks Scott Carullo Technical Operations 855-FLSPEED x102 _____ ---------------------------------------------------------------------------- ---- WISPA Wants You! Join today! http://signup.wispa.org/ ---------------------------------------------------------------------------- ---- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
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