|[AMRadio] Re: [Boatanchors] Feedline Spreaders|
collinsradio at adelphia.net
Thu Feb 15 09:53:17 EST 2007
Sandy, I am going to use 6 inch spacers that are made of ceramic. I have
some E.F. Johnson round spacers that will be part of the system.
I would think that I will use a lot of spacers if I space them 1 foot apart.
I guess it is a matter of keeping the two wires from touching.
Would you recommend a double extended Zepp or just a Zepp, 134 feet? I
thought of going 265 feet with the feeders attached in the middle of the
antenna with an insulator of course.
Somehow, I seem to be going backwards instead of forward in time. We are
going to "construct" an old time shack from the 30's and need an authentic
antenna configuration with a Collins antenna tuner.
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----- Original Message -----
From: "Sandy W5TVW" <ebjr at i-55.com>
To: "Jim Brannigan" <jbrannig at optonline.net>; "david knepper"
<collinsradio at adelphia.net>; <boatanchors at mailman.qth.net>;
<amradio at mailman.qth.net>
Sent: Thursday, February 15, 2007 9:45 AM
Subject: Re: [Boatanchors] Feedline Spreaders
> The spacing isn't very critical at all. Anything from 2-6" spacing and
> wire from #16-#12. Single conductor black plastic insulated wire works
> just fine. #14 guage OK. If you make the insulators so they are spaced
> about 4" and place a spacer every foot. The spacers can be wood that's
> been soaked in hot beeswax for a while. Don't try regular paraffin
> sealing wax as it will melt in the sun. Beeswax will not. Spacers can be
> made from any DARK plastic (plexiglas, lexan, etc.) Avoid clear plastic
> as the sun will ruin it after a year or so. Years ago guys were using
> plastic "Toni" haircurlers, but the sun played hob with them after a
> while. Impedance? Anything from around 250-600 ohms OK. I no longer use
> home brewed open wire as the "window" twin lead is too readily available
> (common 450 ohm stuff) and will handle a KW. all OK.
> Sandy W5TVW
> ----- Original Message -----
> From: "Jim Brannigan" <jbrannig at optonline.net>
> To: "david knepper" <collinsradio at adelphia.net>;
> <boatanchors at mailman.qth.net>; <amradio at mailman.qth.net>
> Sent: Thursday, February 15, 2007 8:23 AM
> Subject: Re: [Boatanchors] Feedline Spreaders
>> What impedance are you looking for?
>> The "Handbook" has formulas.
>>> What is a "good" spacing between 6 inche spreaders, using #14 wire, let
>>> us say.
>>> Thank you
>>> Dave, W3ST
>> Boatanchors mailing list
>> Boatanchors at mailman.qth.net
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