Gary,
Try shortening by 3% for 4" aluminum vs 12 AWG copper.
Matt
KM5VI
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Gary
Schafer
Sent: Monday, October 06, 2014 9:38 PM
To: 'towertalk reflector'
Subject: [TowerTalk] Antenna element diameter \ length calculation
I am helping a friend with an 80 meter 4 square vertical.
Can someone tell me how to calculate the difference in length when 4"
aluminum pipe is used for the elements verses wire elements?
Thanks
Gary K4FMX
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