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Re: Coax Selection - idea !!



Dave,

The bend at the top of the vent pipe is critical.
I use a slightly different approach that does not subject the coax to a full
180 turn
more like 135 degrees.   I use a 45 degree pipe junction. [works even better
for buried pipe ! ]

  |
 /|
  |

You can pull cabling straight up (great for cable pulling).  Carefully bend
cable down the 45
degree branch.

When finished, leave a pull string.

Then put a screw on "waste plug" [square top for wrench] on the top to
prevent rain, etc.

Greg
w9gb

----- Original Message -----
From: "Tipton, David M." <tiptondm@opensysgroup.com>
To: <amsat-bb@AMSAT.Org>
Sent: Thursday, November 08, 2001 9:39 AM
Subject: [amsat-bb] Coax Selection


> I am going to go pick up some coax this weekend (Or maybe even tomorrow at
> lunch) for my satellite antennas.  The plan is to cut a whole in the roof,
> mount a "Vent Pipe" with an angled end (Looks like an upside down J) and
run
> the coax through this, and run the coax the 5 feet across my attic and
down
> through the wall into the shack.  (I have a 1 story home.)  The total
> distance from the antenna mount to my rig, is about 30 feet.  I figure on
> adding an additional 20 feet to compensate for errors in calculations and
> for rotation.
>
> This means that my total run will be around 50 feet.
>
> I want to know, on a run this short, what are my best cost/performance
> options?  Will 9913 work well?  Or Just Well Enough?  Would I be wasting
my
> money going to something like LMR400?  Would I gain anything worth noting
by
> going to LMR 600?
>
> Am I overlooking any other obvious choices?
>
> These coax runs are to feed the UHF and VHF Satellite antennas btw.
>
> Dave
>
> ----
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>


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