Recognizing the weight and size ok...I agree the crane is the most efficient
and safest way to go for a multitude of reasons. But I have no idea what a
square boom has to do with not using a PVRC mount. I would think one would
merely attach the boom to the tilt plate with square clamps. I use them on
my H-frame...got them at a trailer supply outlet. Am I missing something? -
Mike
-----Original Message-----
From: Jim Thomson
Sent: Thursday, May 19, 2016 10:57 PM
To: towertalk@contesting.com
Subject: [TowerTalk] Strategy for Erecting Large Yagi
Date: Thu, 19 May 2016 18:48:18 -0700
From: Jerry Gardner <jerryw6uv@gmail.com>
To: Tower Talk <towertalk@contesting.com>
Subject: [TowerTalk] Strategy for Erecting Large Yagi
Hello Tower Talkers,
I've decided to replace my TH-7DX with a larger antenna that includes 40M,
so I bought an OptiBeam OB17-4 and need to figure out a way to get it up on
the tower.
I was able to build the TH-7DX in my front yard in one piece and it was
then a simple job to tram-line it up to the top of the tower. The OB17-4 is
way too large to be completely built anywhere near the tower so I need to
figure out the best way to get it up there in pieces.
I have enough room to build the boom and the elements individually, but not
enough to assemble them to each other. For anyone not familiar with the
OB17-4, it has 17 elements on a 39' boom. The three 40M elements are 48'
long. The boom and each of the 40M elements has a truss to prevent sagging.
The tower is 60' free-standing with a 20' mast.
Anyone have any tips on how to make this work?
73,
Jerry
## The pvrc mount wonmt work since the optibeam uses a square boom. A
buddy has the
OB17-4 and the damned thing weighs 220 lbs. ( 100 kg).... not including
coax + balun.
He used a crane to lift it to the top of his 80 ft freestanding tower.
Trying to manhandle a
220 lb ant on the roof of a home is no fun. Too much to go wrong.... one
mistake and you could easily
damage yourself..or the roof....or the yagi....which is one helluva lot of
money..and made from
metric sized tubing.
## Use a crane if at all possible. That’s the fastest, safest way to to
get it up there...and requires
the least amount of people for help. Wham bam..done.
Jim VE7RF
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