On 1/10/02 1:03 PM, Thomas Beltran at email@example.com wrote:
>This discussion of Masts is quite timely for me. I was planning on using
>schedule 80 Aluminum pipe for a TH-3MKIII and perhaps a rotatable dipole for
>17. Should I consider one of HRO's steel masts?
What you left out is how high above the tower top you planned to have the
antenna(s). That makes all the difference.
In general, I'd avoid the use of "pipe" of any kind for a structural
component, but if the antenna is right at the top of the tower, the
bending moments are small enough that even "pipe" would work.
I've got an A3S mounted 6 feet above the top of the tower on a 2" Al tube
with a 3/32" wall. Plenty strong enough.
Bill Coleman, AA4LR, PP-ASEL Mail: firstname.lastname@example.org
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901
This list is sponsored by the new eHam.net Store. When you buy products
like ICE filters, Array Solutions StackMatch, or M-Squared Antennas from
the eHam Store for the same price you pay direct, a portion of the sale
price goes to support this list. Check it out at http://www.eham.net.
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Administrative requests: towertalk-REQUEST@contesting.com