[TowerTalk] field-day mast anchoring question

[David Gallatin]

It would appear he is in Vermont and maybe intends the same thing, just with a yagi.  I'm going to say this is not a good idea. You're going to have about 50-55 lbs at the top of a 50 foot long moment arm, giving 1200-1300 lbs effective moment and only a few hundred at the bottom. Not good enough. If you truly feel the ground is too soft to use guys then you might try looking up the term "drive on antenna base" and hamgeneering together something like that.  73, David, AA9G ex W5DCG and KC9EEV
 

      From: Larry Banks <larryb.w1dyj at verizon.net>
 To: towertalk at contesting.com 
 Sent: Friday, January 22, 2016 11:05 AM
 Subject: Re: [TowerTalk] field-day mast anchoring question
   
We (W1HP) put up a "two-el" inverted-V.  Only takes two fiberglass poles for 
the centers and no guys -- the wire acts as the side guys and the poles are 
strong enough to not need guys in the fore/aft direction.  If you are not 
going to rotate it, why go to the trouble of a 2-el yagi?  (From the Boston 
area we just point WSW.)

73 -- Larry -- W1DYJ



-----Original Message----- 
From: dw
Sent: Friday, January 22, 2016 10:31
To: towertalk at contesting.com
Subject: [TowerTalk] field-day mast anchoring question


For those familiar with the AB-621 military launcher mast units.
Lets say there was an interest in using this on a field day event, where
there is a concern that the ground is too soft to safely establish
anchors.
Is there a possibility of using concrete wall-barrier blocks bolted
together, as dead-weights to safely hold the anchors?
For example, I think I can come up with a number of 60lbs cement
wall-barrier slabs that can be bolted together for each anchor point.
If this would be a viable option, how much weight on the anchor blocks
would guarantee a safe installation?
The intent is to put up a 40 meter 2 element yagi, without a rotor, at a
height of 50 feet.

Thanks in advance.
N1BBR
-- 
Bw_dw at fastmail.net

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