[Antennaware] 40m array

Tony Osman tony.osman at xplornet.com
Tue Feb 17 19:43:30 EST 2009

I thought there might be some words of wisdom for me on this list....

I am looking to build a 40m 4-square but currently I am looking at 
mortgaging the house to pay for aluminum - cant seem to find a scrap 
yard anywhere that has any - they are recycling as fast as they can get 
the money for it....

So, I have a 68ft vertical built from 3inch irrigation tubing.  Could I 
use this to suspend a K8UR type dipole array?  I understand that to get 
the best operation of this array, the coax feeding the dipoles should 
come away parallel to the ground.  This means they would connect to the 
vertical at about 25 feet or so off the ground.  I would then bring the 
coax down the vertical to the matching box at the base of the vertical 
(of course adjusting the coax lengths to provide correct current forcing 
to each dipole).

My question is - when using the vertical on 80m and 160m (it will have a 
trap at the top of the vertical with top-loading wires for 160m) with 
approx 1KW, will there be any adverse effect on the dipole array or the 
matching network - similarly would these have any effect on the vertical 
for 80/160 operation?

Thanks in advance for any information.


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