What did famed moon-bounce king Sam Harris used to say....? "If your
antenna stays up its not big enough" ☺
On 2/2/2017 4:58 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
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|