Quads don't have to have spreaders. For 6m, the elements can be made of
aluminum tubing and attached to the boom (using element to boom insulators).
Perhaps attach them to the bottom of the boom so that the elements are
"hanging" down. Since this contraption is going on a 100' tower, the 5' loss of
height is insignificant.
Rudy N2WQ From: Jim Thomson <jim.thom@telus.net>
To: towertalk@contesting.com
Sent: Tuesday, August 30, 2016 12:22 PM
Subject: [TowerTalk] 6 mtr quad
Date: Mon, 29 Aug 2016 18:52:14 -0500
From: Courtney Judd <k4wi@k4wi.net>
To: "Towertalk@contesting.com" <Towertalk@contesting.com>
Cc: ACG <contest@alabamacontestgroup.org>, SECC <secc@contesting.com>
Subject: [TowerTalk] 6 mtr quad
I have been thinking about building a monster quad for 6 mtrs. I have
googled quads and all about but came up with very little data to work
with. I did find a 7 el regular spaced quad on 19 ft boom but I was
thinking of more elements and wide spaced... I have several 44 ft 2 in
booms or even a 60 ft 3 in boom. I wanted to stick this on my rohn 45 at
100 ft. Anyone have any ideas or can point me to a web site or reflector
where i could find something like this? Thanks, Cort K4WI
## The problem with quads is the spreaders do nothing...except to
support the (failure prone ) wire loops. The windload on the 4 x spreaders is
a heck
of a lot more than a simple yagi element.
## IE: you require 4 x 13 ft spreaders to build a 20m ele. Thats
a total of 52 ft of spreaders..just to make one 20m ele = nuts. And
double all of that for a 40m full size quad ele.
## My short 40M f12 eles are only 44 ft long....and my longer F12 40m eles
as used on the f12 N series of 40m eles, range from 52-59 ft long.
## 6m eles are only aprx 10 ft long. Tha’s dead simple to make from .375 +
.500 tubing. 6 ft center section of .500 tubing...with .375 tips. Use a 6
ft length
of .500 tubing for the center section...and 3 ft sections of .375 tubing for
each tip.
## Thats cheap at dx engineering. Quads are a pita. 4 x spreaders per ele,
and
some form of spider to mech connect all the spreaders..then onto the boom.
## a buddy has the m2 6m yagi...on the 52 ft boom. It’s a flame thrower..and
light weight.
## quads + quagis went the way of the do-do bird. dont even go there.
Jim VE7RF
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