Converted mine a couple years back to Coils from N6BT Antennas. He also
supplied the needed tubing for the conversion and I think it all came to
less than $300.
Chuck W6RD
On 12/21/2019 7:14 PM, N4ZR wrote:
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
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.
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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