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Re: [TowerTalk] 6 or 8 ele 20 meter beam

To: towertalk@contesting.com
Subject: Re: [TowerTalk] 6 or 8 ele 20 meter beam
From: W0MU Mike Fatchett <w0mu@w0mu.com>
Date: Thu, 2 Feb 2017 15:20:36 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Good points. I have a broken 4 ele SteppIR which is now a 3 ele for now at the top 70ft.

I was looking for something with big gain east for Stateside. There probably is not enough gain to be gained vs the engineering issues. I have ring rotator and planned to mount another SteppIR or something at around 40ft. Stack match is in hand so that might be the best option for gain vs too big and the stack does give options.

Thanks for all the feedback.  I have plenty to work with.


On 2/2/2017 1:58 PM, Jim Thomson wrote:
Date: Wed, 1 Feb 2017 12:12:24 -0700
From: W0MU Mike Fatchett <w0mu@w0mu.com>
To: Towertalk <towertalk@contesting.com>
Subject: [TowerTalk] 6 or 8 ele 20 meter beam

I am looking to side mount and maybe rotate a 6 or 8 element 20 meter
beam would anyone care to share their designs?  I have a bunch of
aluminum itching to become an antenna!

W0MU

##  side mount on what type of tower ?    Maybe rotate  ?   If it
is fixed in direction,  you are stuck in one direction, with half power
points well  below 48 degs.

##  dave is right, stacking a pair of small yagis  would provide the
same aprx amount of gain.  A pair of 204BAs, at 40 lb each, is
a lot easier than  60-88 ft long boom monsters.   Then you can use
the typ  top – bottom – both config.   The monster yagi, at the wrong
height for that particular  time of day leaves you with no options.

##  with a boom in the 60-88 ft long range, the  tq issue on the tower has
to be dealt with.  Along with ice + snow loading, ice + wind at the same time.
If the swr is off a bit, then what, haul the monster back down ?   Any type of
feedline  or balun issue, and again, it has to come back down.   There is  big, 
then
there is too big.

Jim  VE7RF

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