On Sunday 05 February 2006 07:57, Robert Thorpe wrote: >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of Bob Paddock >> Sent: 04 February 2006 19:48 >> To: [email protected] >> Subject: Re: gEDA-user: Tin pest[Scanned] >> >> > Good is also putting 100m of UTP cable on a flat roof. If it >> > rains, the cable lies in ponds of water and the RF energy which >> > travels partially outside gets lost in the water. Packetloss at >> > 100Mbps results. We had this problem. >> >> The local Amateur 2M repeater had a 200 foot tower next to >> the building. >> The repeater was on the second floor of the building, but the >> cable went from the bottom of the tower to the building underground. >> >> Took the connector off of the repeater to do some service >> work and buckets of water poured out of the hard line coax. >> Capillary action to suck it up to the second floor, or simple >> push down the 200 foot of coax coming down the tower? Either >> way I was not impressed with being all wet. > >This is quite a common problem. N-type and 7/16 coax cables have > rubber seals in them to attempt to prevent water from the inner > leaking into equipment. In some climates the coax cables on > cellphone towers have to be replaced every 12 months because of the > water.
At the price of that, wouldn't air lines & a bottle of GN2 be indicated? Sure makes sense to me anyway. 1/4 of a psi in the line stops all that stuff since the water can't get in in the first place. -- Cheers, Gene People having trouble with vz bouncing email to me should add the word 'online' between the 'verizon', and the dot which bypasses vz's stupid bounce rules. I do use spamassassin too. :-) Yahoo.com and AOL/TW attorneys please note, additions to the above message by Gene Heskett are: Copyright 2006 by Maurice Eugene Heskett, all rights reserved.
