In fact, I believe F12 in later years made the 40M single-band antennas
(called the Delta line) with coils in place of the linear loading. That
said, I had one up at 104 feet for 15 years with the original alumoweld
wire, and zero issues
73, Pete N4ZR
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On 12/21/2019 5:26 PM, Richard Smith wrote:
Hi Jim,
Sorry to sound dumb, but what is an hb coil?
73, Rich, N6KT
On Saturday, December 21, 2019, 02:13:15 PM PST, Jim Thomson
<jim.thom@telus.net> wrote:
Date: Fri, 20 Dec 2019 14:01:20 -0600
From: N5KM - Kris <n5kilomike@gmail.com>
To: "towertalk@contesting.com" <towertalk@contesting.com>
Subject: [TowerTalk] Force12 rebuild
<Im rebuilding my Force12 40m yagi. What would you recommend as replacement
<for the alumoweld linear loading wires? Some of these wires have snapped in
<the past due to years of vibration.
<Note: as part of the rebuild I am adding truss supports for the 3 elements
<in order to remove the stress on the linear loading wires.
<Kris N5KM
## replace the LL alumoweld fubar with hb coils... like either al or cu. Use
dacron rope for the
new truss supports.
## Dont even think about using SS wire..... the losses are beyond sky high. It will
break anyway, cuz of metal fatigue.
Stranded CU wire would work, but hb coils are simpler.
Jim VE7RF
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