Thanks to all for your comments on my new conduits. I'm now thinking the
LDF5-50 sounds like it's hardly worth the hassle for a few tenths of a dB at
30 MHz. Do many of you have experience with LMR 600 coax? Any suggestions
regarding suppliers and/or connectors?
73,
Steve
N6SJ
----- Original Message -----
From: "Steve Jones" <n6sj@earthlink.net>
To: <towertalk@contesting.com>
Sent: Monday, September 12, 2011 2:14 PM
Subject: New Conduits
>I need to install underground conduits to my new HDX-589 crank-up tower.
>The distence between my garage wall and the tower foundation is about 125'.
>I plan to put in straight conduits with a 90 degree sweep at each end where
>they come up out of the ground. I plan 4 #10 copper conductors in a 1" PVC
>conduit for 220VAC power to the raising winch. For the coax I'm hoping to
>score some local surplus 7/8" LDF5-50 heliax. I have been thinking of
>using one 4" conduit for three runs of the 7/8" heliax, and a second 4"
>conduit for various control cables (RF switches, rotor cables, SteppIR
>control, etc.). So I'd have two 4" conduits and one 1" conduit in the
>trench. Those of you who have experience with such installations, please
>tell me:
>
> 1. Are these conduit diameters adequate for my proposed loading? I have
> put in 4" PVC water pipe and it's unwieldy stuff to work with, so if I can
> get by with smaller conduit pipes I'd prefer to.
>
> 2. What is a good source for electrical boxes to terminate these cables
> above ground at each end?
>
> 3. Is there a better way to control the rotor, switches, SteppIR etc. by
> using Ethernet in the conduit and local AC power at the tower?
>
> 4. Is there something better than Ivory liquid for a cable lubricant?
>
> 5. What have I not mentioned that I need to address?
>
> I appreciate any and all advice!
>
> 73,
>
> Steve Jones
> N6SJ
>
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