On 9/25/2011 9:06 PM, Jeff Liebermann wrote:
On Sun, 25 Sep 2011 18:46:17 -0500, Jeffrey
wrote:

Each cross brace has about a dozen 2" diameter galvanized stubs to
attach the antennas to. They are bolted directly to the cross braces.

All the wood was treated with Creosote just like the poles themselves.
The site was at least 40 years old the last time I was up there in 2005.

You mean like this?
http://802.11junk.com/jeffl/pics/Old%20Repeaters/slides/LoopMtn02.html
http://802.11junk.com/jeffl/pics/Old%20Repeaters/slides/LoopMtn03.html
We had similar derrangements at 3-4 other sites. Telephone poles and
lumber were about 20% of the cost of a galvanized steel tower.

Been on Loop Mountain too. And Oat, Lukens and Mt. Wilson.
The "tower" I was referring to specifically though was Hollywood
Hills.

Lightning protection was at the entry point to the building with a
metal plate with some PolyPhasor feed through protectors. The end and
highest antennas were also grounded with a undersized #4 copper wire
running down the pole to a ground rod at the base. We didn't get any
lightning hits because there was an all metal forestry lookout at the
highest point on Santiago which took all the hits.

The grounding inside and outside the building was your typical "Amateur"
installation. 3/4" water pipe with 90 degree elbows soldered together.

Our real protection was the water tank owned by the DWP slightly up
the hill from us. Similar to ranger tower protecting Santiago.

The stubs didn't look any worse than the usual stubs bolted to metal
tower assemblies.

We used the same hardware that was used the Ma Bell. Thick galvanized
and loose fitting steel hardware. Same as what the typical steel
tower is made from these days. It works nicely on both metal and
telephone poles.

Yup. Works moderately well until you get some clown in the building
that runs an 8-way receive antenna and 8 bandit taxi cab repeaters.

Jeff

--
"Everything from Crackers to Coffins"