[Microwave] Clamping hardline to towers & water proofing (greasing) RF connectors

David Garnier [email protected]
Sun, 04 Jan 2004 09:30:54 -0600


Hello,

Pardon my the cross postings, I have 2 questions
concerning using hard-line coax, (attached it up
tower structures and the moisture preparation of the
RF connector mating surfaces.)

1) How does one attached hard-line coax up a
structure without causing problems due to it's weight?
    a) Plastic tyraps don't seem like a good idea to
use in cold weather due to plastic becoming "brittle"
(for the lack of good terms.)
    b) Metal hose clamps seem like a more positive
clamping solution, however one could puncture the
plastic/rubber coating and cause problems, (intermod.)
    c) How about using a rubber gasketing around the
hard-line (a short section garden hose slit lengthwise)
for clamping to the tower?
    c) What does the cellular industry use for clamping
runs of hard-line up towers?
    d) What in your experience has proven to work
well?

2) What are the pro's and con's of greasing mating
hard-line coax connectors?
    a) If one uses a grease, say Lithium or Permatrox,
what does this do to the DC resistivity of the mating
connectors?
    b) Any thoughts about what this grease does at RF
mating junctions?)
    c) Dissimilar metals used in connector mating
junctions, appears to be a problem in cellular industry.
    d) Ever hear of "tweak" (a conductive substance
that some audiophiles use on phono or line output
jacks?
    d) Black electrical tape doesn't like to stick to
hard-line connectors if one is sloppy. ;-)

In advance, thank you for taking time in writing me
a response to these questions. Regards.

dave garnier - wb9own