Big, heavy mast

[K8DO at aol.com]

In a message dated 96-06-19 15:54:45 EDT, you write:

<< Anyway the short answer to your question for 2 1/2" SCH 40 is 3192 ft.lbs.

 of bending load, assuming you know the pedigree on the steel meets ASTM 
 standards. If you don't know, then use 27,000 psi and 3/4 of the 3192, or 
 2400 ft.lbs. >>

Just to reinforce the point.... 11 sq. ft. of antenna in a 50 lbs. per sq.
ft. wind gust will reach the 3192 ft. lbs. limit at 5.8 feet above the
tower... the same antenna 10 feet above the tower (very common) will fold the
mast over...

As I have commented before, the best mast for raising an antenna 10 feet is
another section of tower...


Denny

>From fisher at hp-and2.an.hp.com (Tony Brock-Fisher)  Thu Jun 20 17:28:31 1996
From: fisher at hp-and2.an.hp.com (Tony Brock-Fisher) (Tony Brock-Fisher)
Date: Thu, 20 Jun 1996 12:28:31 -0400
Subject: FD Rules Question
Message-ID: <9606201628.AA19254 at hp-and2.an.hp.com>


A question for the masses:

In Field Day, is it allowable to run a VHF packet station AND a
VHF SSB/CW station at the same time without increasing the 
entry class?

The rules for packet (8.A.8) and VHF (8.A.9) each separately state
that they don't count as an additional transmitter. Does this mean
we don't have to take packet off the air while making VHF Q's??

-Tony, K1KP, fisher at hp-and2.an.hp.com
p.s. Look for the Hewlett-Packard Andover Radio Club, W1HJS, 2A EMA!!