Totally agree.
I built a dipole one time and fed it with the 450 Ohm window line
everybody likes to use.
I twisted the ends of the window line and crimped a couple of terminals
on the ends. If it was going to be a permanent antenna I would have
soldered it.
Two years later when I took it
: Wednesday, February 10, 2016 4:58 AM
Subject: [Elecraft] Seeking loop Antenna Parts
So, based on a brief survey today, my first "real" antenna will be a
nominally horizontal delta loop, while I save for and get construction
designs approved for my tower. I'm seeking some specific
On Wed,2/10/2016 4:41 AM, Don Wilhelm wrote:
Clay,
You should be able to find suitable pulleys and cord at a marine
supply store.
Pulleys yes. Cord at a marine store will be expensive. Here's a link to
the company that makes great antenna rope that is resold by several
large ham vendors.
Copper is fine for conductivity but:
multistrand copper coated steel
is longer lasting. Just remember this when you start trouble shooting
strange swr in a couple of years. Copper breaks so easy.Go to the
Wireman.com for some good wire.
NE7LS
On Feb 10, 2016 1:59 AM,
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Seeking loop Antenna Parts
Copper is fine for conductivity but:
multistrand copper coated steel
is longer lasting. Just remember this when you start trouble shooting
strange swr in a couple of years. Copper breaks so easy.Go to the
Wireman.com
One point to consider if running the antenna wire through a pulley. It
will work back and forth in the wind and as trees move. The constant
flexing will take its toll on the wire. A stranded wire with insulation
I have found preferred and lives longer.Also, use large diameter
pulleys to
I never had a problem with THHN, but stranded copper weld had a very short
life in Aruba.
John KK9A - P40A
N2TK, Tony tony.kaz at verizon.net
Wed Feb 10 14:00:43 EST 2016
In the Caribbean the sun and salt spray gives short life to most wires. I
bought on eBay several years ago stranded
The rigging you describe is almost exactly what I am planning.
I can replace broken 14 AWG THHN 3 times for the price diff... IF it
breaks... and I will simply use a non-stretching down-line on the
tension weight and monitor its descent toward the ground to determine if
and when to trim the loop
Yes, with copper weld it is copper plated over steel. Once the copper
gets pitted or scored, the elements can get to the steel core, it will
rust, expand under the copper causing the copper to further shed and the
steel will rust and break. If one must uses solid or stranded, hard
drawn is
That support rope Jim referenced has done a great job here for a number of
years supporting wire antennas over 100 feet long hung in tall fir trees. I
did provide strain relief - a pulley at one end attached to a weight so the
tree can move freely. We do get winds gusting over 60 mph here most
So, based on a brief survey today, my first "real" antenna will be a
nominally horizontal delta loop, while I save for and get construction
designs approved for my tower. I'm seeking some specific parts and
"preferred" vendors:
1) 3 each, 3" / 75mm MINIMUM diameter "plastic" (UV resistant)
Clay,
You should be able to find suitable pulleys and cord at a marine supply
store.
I would recommend using hard drawn copper for the wire rather than
THHN. You can find THHN at your local DIY store. For hard drawn
copper, look at The Wireman www.thewireman.com.
A 32 foot heavy duty
Clay I have rolls and rolls of thhn. As for pulleys and etc Home Depot can
help. Keep it simple. It will work
Better
Hard drawn is totally not necessary for your loop. And it's expensive
How are you feeding the loop? 450 or 300 ohm line is best. If your going to use
it on multiple bands stay
On Wed,2/10/2016 10:37 AM, Nels Nelsen wrote:
multistrand copper coated steel is longer lasting.
Not in my experience -- my neighbor hung a dipole strung with copperweld
(what you're describing, I think) in some trees with tension on it and
with pulleys and weights to deal with tree sway. It
Subject: Re: [Elecraft] Seeking loop Antenna Parts
That support rope Jim referenced has done a great job here for a number of
years supporting wire antennas over 100 feet long hung in tall fir trees. I
did provide strain relief - a pulley at one end attached to a weight so the
tree can move freely. We
Copperweld is "nasty" stuff IMHO. If you can support it so it will not
flex, you can tension it greater than plain copper. But it 'remembers'
the coils it had on the wire spool and will spring back to those coils
if allowed to remain free and untensioned. If you pull it while it has
a kink
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