aren't they also called 'center feed zepp' antennas?
Mike, WB8VGE
SunLight Energy Systems
The Heathkit Shop
http://www.theheathkitshop.com/
J e e p
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On Oct 15, 2013, at 3:53 AM, Rick - DJ0IP / NJ0IP wrote:
> Semantics.
>
> I learned yet another meaning of the word doublet.
>
> I think we agree that the word "dipole" alone means a half wavelength
> radiator, fed in the middle.
> We 300 Ohm is used as Jim described, I have always referred to it as a
> folded dipole, even though real folded dipoles have the two horizontal wires
> spaced farther apart.
>
> Whenever a random length of wire was fed in the middle, I called it a
> doublet.
> So a dipole is always a doublet but a doublet is only a dipole when it is
> exactly a half wavelength long.
>
> I have often used the word doublet when working with openwire fed antennas
> because they are often not cut to a specific half wavelength some band.
>
> I'm not saying my way is correct, but that's what the boys called them 50
> years ago in the Texas/Oklahoma neck of the woods.
>
> 73
> Rick, DJ0IP
>
>
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Richards
> Sent: Tuesday, October 15, 2013 8:40 AM
> To: k9yc@arrl.net; Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] Antenna is up, but the coupler doesn't like 160 meters
>
> Mike told us what he has.
>
> The ARRL Antenna Book defines "doublet" as
> synonymous with "dipole," but I understand
> many hams intend the locution "doublet" to refer
> to a type of dipole fed with open line to
> facilitate tuning it on multiple bands using
> a matchbox/tuner device.
>
> Based on what Mike already said:
>
> His doublet is approximately .5 wavelength on 160 meters, consisting of two
> identical 131 ft long conductive bilaterally symmetrical elements made of
> metal wires, with opposing voltages, fed with 170 ft (+/-) of
> 600 ohm open transmission line.
>
> N'est ce pas ?
> -------------------- K8JHR -----------------
>
>
> On 10/15/2013 2:11 AM, Jim Brown wrote:
>> On 10/14/2013 2:52 PM, Mike Bryce wrote:
>>> The antenna is a doublet
>>
>> Please define what you mean by a "doublet." When I started in ham
>> radio
>> 58 years ago, that was a dipole made out of 300 ohm twin lead, with
>> one side broken at the center and connected to another piece of 300
>> ohm line that went to the shack. Is that what you have?
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