[Milsurplus] Tower Construction

[D C Macdonald]

My Rohn book doesn't give any info on using 55G
in a self-standing mode.  However, the allowable
height for 45G unguyed is 57.8 feet with 2 sq ft
load at 70.7 mph with a safety factor of 1.5.

The total height would, of course, decrease as you
add more antenna.  Basically, you're on your own.

I wouldn't hesitate to put something like a Bencher,
SteppIR, Force 12 4 element array at 35, maybe
40 feet.  Stick a set of Phillistrand guys at 30 feet
or so and same antenna at total of 45 would be
better.

73  ---  Mac, K2GKK/5


----Original Message Follows----
From: "David Knepper" <cra at floodcity.net>
To: "Discussion of AM Radio" 
<amradio at mailman.qth.net>,<collins at mailman.qth.net>, 
<milsurplus at mailman.qth.net>
Subject: [Milsurplus] Tower Construction
Date: Sun, 13 Jun 2004 16:47:50 -0300

I am contemplating placing a 10 foot section of Rohn 55G halfway in a cement
base.

Could someone suggest how many section could I add if the tower were
self-supporting.

Any suggestions would be appreciated.

Thank you

Dave, W3ST
Publisher of the Collins Journal
Secretary to the Collins Radio Association
www.collinsra.com

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