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[TowerTalk] Plumbing > Hardline

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Subject: [TowerTalk] Plumbing > Hardline
From: k1ttt@arrl.net (David Robbins K1TTT)
Date: Wed Jul 16 19:38:07 2003
> 
> You may have different size hardline, and thusly different dimensions.
I
> suggest you take a piece of your hardline, a PL-259, and a SO-239 down
> to your local professional plumbing supplier and ask them to help.
>
the biggest problem with that is trying to explain to them why your pipe
is full of foam!

1/2" compression fittings work well for 1/2" catv hardline to pl259's as
described.

For 5/8" or 3/4" look for either a reducer or adapter (yes they are
different though the normal plumbing section guy won't know why and it
doesn't really matter) that just fits over the outside of the hardline
and that a barrel connector just fits into (usually 1/2" tubing)  take
the guts out of the barrel connector and solder the shell of it into the
reducer.  Cut a couple slots in the big end of the reducer. Trim the
center conductor of the hardline so when the pin of the barrel connector
is soldered on it just reaches the end of the barrel when slipped over
the end of the hardline.  Use just the end insulator on the barrel pin
to hold it centered, use a hose clamp to secure the connector to the
hardline... goop well with duct seal to waterproof.

You can do similar things with bigger diameters but cut slots in the
hardline shield and dig out some foam then slip the reducer inside the
hardline and clamp the hardline to the outside of it.. if the center
conductor is too big to fit in the center pin of the barrel connector
solder some coax braid to it and solder the center pin to the braid.

Don't like hose clamps?  Instead of a reducer find a threaded pipe to
tubing adapter.  Instead of cutting slots to clamp it on just thread it
on the aluminum shield with a liberal dose of silicone grease to
lubricate and seal it.

Lots of neat things can be made out of hardware store pipe fittings,
everyone should be familiar with what is there.


David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
 

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