RE: gEDA-user: Tin pest[Scanned]

["Robert Thorpe" <Robert.Thorpe@xxxxxxxxxxxx>]

> -----Original Message-----
> From: owner-geda-user@xxxxxxxx 
> [mailto:owner-geda-user@xxxxxxxx] On Behalf Of Bob Paddock
> Sent: 04 February 2006 19:48
> To: geda-user@xxxxxxxx
> 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.