On the house (see photo #3 from the top on
http://www.rogerhalstead.com/ham_files/cablebox.htm and the tower is
currently (see last 6 photos for current set up)
The box on the house contains a SPG, Polyphasers, and excess pull
cable. I don't have a photo of the larger box currently installed. A
stub of 3" PVC conduit goes through the plate, into the basement.
Pressure differential changes cause the basement to breathe in and out
through this conduit sometimes causing condensation in the conduit. So
far, it has never amounted to enough to cause a problem by freezing.
73
Roger (K8RI)
On 3/4/2015 10:34 PM, Perry K4PWO wrote:
I still don't understand the "French drain" stuff. I have a 70' run of two
3", one 2.5", and two 11/4" conduits from my tower to my house. At each end,
I have the conduit terminated in metal 18" X 16" X6" NEMA 4 boxes. The
boxes allow the conduit to breath and in the seven years they have been
installed, all I've found in them is cob webs. I just pulled some Cat 5E in
one of the 11/4" runs and it was as dry as a bone.
Like a lot of the Southeast we are currently in the middle of a freezing
lake... flood, then ice, finishing with snow. In other words a lot of
moisture. If I had used the "French drain" my coax coax would be swimming.
Perry K4PWO
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73
Roger (K8RI)
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