Re: wire for random wire antenna using kx3

Posted by DC-3 on Dec 17, 2018; 9:22pm
URL: http://elecraft.85.s1.nabble.com/wire-for-random-wire-antenna-using-kx3-tp7647146p7647161.html

Good one!


Many hams now-days  miss the most important point of all, I have never
made a contact by computer modeling, and worrying about wire type and
size.  Back in the day, you put something up and experimented from there
-- making contacts along the way.  Now, folks look at the internet and
then second guess everything they read to the point of information
overload and analyses paralyses.

Too Bad,

Richard

K6VV


On 12/17/2018 7:09 AM, Charlie T wrote:

> Yes, but speaker wire is only good for audio up to about 25 kHz.  It has a
> frequency limiting component in the wire alloy that must be removed in order
> to use this type wire at RF.
>
> This removal procedure is fairly easy to accomplish.  First, soak the wire
> in a bucket of laundry detergent and water over night, then remove the wire
> and rinse it thoroughly.
> After assuring the wire is dry, place in an oven set to about 150 degrees
> for about 3 - 4 hours.
> In lieu of the oven, you can also place the wire in an afternoon of summer
> sun.
> After that, place the wire on the ground and hold a 2 meter hand-held over
> the wire, approximately a foot away and key up the radio for 20 seconds at a
> couple watts output.
> If you see no reaction, sparking, especially tingling in your ears,  or
> physical movement of the wire, it is now safe to use as an antenna.
>
> Note this advice is given freely and may be disseminated with no intended
> royalty charges or copyright infringements.
>
> 73, Charlie k3ICH
>
>
>
> -----Original Message-----
> From: [hidden email] <[hidden email]> On
> Behalf Of Don Wilhelm
> Sent: Monday, December 17, 2018 9:46 AM
> To: Richard watson <[hidden email]>; elecraft
> <[hidden email]>
> Subject: Re: [Elecraft] wire for random wire antenna using kx3
>
> Rick,
>
> Certainly it will work, and makes for a quick temporary antenna,
> particularly indoors.
> However, if you are using the speaker wire as a transmission line, it has
> relatively high loss characteristics, and I would recommend that you think
> about replacing the transmission line part with real parallel transmission
> line for a more permanent installation.
>
> For the radiator section, the speaker wire can remain.
>
> 73,
> Don W3FPR
>
>
>
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