I've put up PVC pipe to about 35 feet, using pretty simple guying. If
you used more complicated guying and keep the wind load at the top
very small, I'd think you could get to 50 feet that way. I used
telescoping sections, 10 feet each of 2", 1-1/2", 1" and 3/4" as I
recall, with a couple feet overlap at each junction. Use 20 foot
sections and maybe start at 2-1/2", perhaps. You can use couplings
turned on a lathe, glued to the bottom of each upper section, to make
a nice sliding fit. Be sure to use enough guy points to keep the
thing straight! Use UV-resistant materials if you want it to stay up
for a while: electrical PVC conduit is generally sunlight-resistant.

You can also get telescoping fiberglass tubes (sold for quad antenna
"spiders") that might get you to that sort of height, with guying and
some ingenuity.

Cheers,
Tom


Mike Sims wrote in message ...
I'm trying to do a point to point 802.11b connection to two friends
houses. This will be my 5th personal installation for wireless point to
point. I have trees in the way on both sides, and need a cost effective
way to get these antennas up 50 feet.

Does anyone have any suggestions for accomplishing this?

Thank You,

Mike Sims

On Wed, 17 Dec 2003 20:58:51 GMT, "Roger Gt"
wrote:


"Mike Sims" wrote in message
t...
In article , says...

Buy a tower?
'Doc
I'd love to, but I need to keep my cost under $250, and I don't know
where to buy them. I live in Hesperia, CA.

Home Depot: Chain link rails are 21 feet long, three with standard
separator clamps will make a 63 foot length. Set four feet into a cement
anchor, guy well! Works for me!

I went to a place that installs the fence and actually found the pipe
cheaper, BUT YMMV.

The nice thing about the steel tubing used for the fence is it is
quite a bit stronger than steel pipe. It won't bend (take a set) as
easily as galvanized water pipe, but OTOH it is more flexible
(springy)

You can also go to a steel supplier (we have several locally) and may
find even better prices. Notice I said *may*. I purchased two
lengths of 1 1/4 and one length of 2" (both with 1/4 inch wall) at
very reasonable prices. As to strength? It's what's holding all the
antennas. http://www.rogerhalstead.com/ham_files/Tower29.htm
The top arrays being 30 feet above the top of the tower.

However I do have to admit, when the wind gets close to 70 MPH it
looks like a bluegill rod that just tied into a monster Bass.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair?)
www.rogerhalstead.com
Return address modified due to dumb virus checkers


Cost? about $150 plus guys!

Where can I buy one of those? I started using 2.5" poles from a local
pipe shop, and I have one mast that is 21', and another that is 8 feet
with three feet down in the concrete. The problem is, I can't even add
10 feet to the mast because the joining point seemed too flexible when I
was trying to insert it ...

This 50' $70 solution sounds like the ticket to me.


---------------------------------------
http://www.randl.com/cgi-local/cart/...&cart=moreinfo

You should be able to find a MFJ Distributor near you that will come close to
that price.

KC*VIF
Greg Z
to thine own sound be true