[Force 12 Talk] Alum-O-Weld Linear Loading Wire

[JOSEPH SZCZUBELEK]

Hi Mike,


The problem I am seeing inside the shack is a rapid rise of SWR when I apply more than 100 watts to the C4S 40 meter rotary dipole.


The antennae is a C4-S with a 40 meter linear loaded rotary dipole. On one end of the composite center spreader (4 foot aluminum center with composite material on the ends) the two end wires spaced 2 inches apart are shorting out thru the composite material. This is plainly visible. The inside aluminum wire on one side has burned thru and broken off as it comes back out of the composite material. The "go to" wire to the spreader is only hanging on to the spreader because it became a hook after the burn thru. The come back wire use to wrap around the wire going in and is now just hanging on by the cable clamp. After 17 years of use, UV light and air pollution have taken their toll on composite part of the center spreader.


Joe  K9DMV

________________________________
From: wa2vun at aol.com <wa2vun at aol.com>
Sent: Saturday, April 28, 2018 8:23:40 AM
To: k9dmv at hotmail.com
Subject: Re: [Force 12 Talk] Alum-O-Weld Linear Loading Wire

Hi
Im Mike WA2VUN
The Wireman has it! on the internet!
what antenna are you replacing the wires on?
73 Mike WA2VUN
I am/ was a force 12 dealer/installer/fixer:-)



-----Original Message-----
From: JOSEPH SZCZUBELEK <k9dmv at hotmail.com>
To: force12talk <force12talk at qth.com>
Sent: Sat, Apr 28, 2018 9:11 am
Subject: [Force 12 Talk] Alum-O-Weld Linear Loading Wire

Does anyone know where "Alum-O-Weld" (steel core aluminum coated) wire can be purchased in a 50 or 100 feet length. This wire was used in the linear loading system for various Force 12 antennas. If you want to stay with the existing aluminum shorting bar in the shape of a large V, one has to stay with aluminum and not mix the metals.



Thanks,


Joe K9DMV
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