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RE: LF: Antennas on low bands : the Siegel and Labus books.

To: "[email protected]" <[email protected]>
Subject: RE: LF: Antennas on low bands : the Siegel and Labus books.
From: Rik Strobbe <[email protected]>
Date: Fri, 29 May 2015 19:59:23 +0000
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Thread-topic: LF: Antennas on low bands : the Siegel and Labus books.

Hi Bob,

 

small is a relative thing on LF.

A DDRR with a perimeter of 0.25 lambda and a height of 0.025 lamdba is indeed small on 144MHz, but on 137kHz the perimeter becomes 550m and the height a respectable 55m.

Not a backyard antenna ...

 

73, Rik  ON7YD - OR7T

 


Van: [email protected] [[email protected]] namens [email protected] [[email protected]]
Verzonden: vrijdag 29 mei 2015 18:30
Aan: [email protected]
Onderwerp: Re: LF: Antennas on low bands : the Siegel and Labus books.

has anyone tried a DDRR antenna on LF
there is info on them in one of the arrl antenna books and I use one on
144 very small but appears to work as well as a 5/8 wave
appears as a small horziontal loop but radiates as a vert
most odd thing but works well on 2 meters
 
Bob K3DJC
 
On Fri, 29 May 2015 17:19:24 +0200 =?iso-8859-1?B?R3V56SBBbmRy6Q==?= <[email protected]> writes:

Hi to all.

 

I see that many questions are on the LF reflector about antennas on low bands, modeling and concerning the lobe formation zones (Fresnel, Fraunhofer and Rayleigh). On the way, that explain why IUT is using the E.I.R.P. as standard of power.

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