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From: "Walter Staubach" <wum.staubach@t-online.de>
To: <rsgb_lf_group@blacksheep.org>
References: <4FEEF3ED.4070503@iup.uni-heidelberg.de>
Date: Sat, 30 Jun 2012 15:26:26 +0200
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Content preview: Stefan, tnx fer info and ok abt ur "ground antenna". Here
QRN low at this moment. We should give the dipole (really? don't know) a chance,
so from time to time will listen. I am just testing a simple way to put up
fiber glass masts for a MF-antenne. Our Club intends to have a small fieldday
at 29.7.12 - only fer MF. 73 Walter [...]
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Subject: LF: Re: An asymmetric feeded full wave dipole for the 630m band
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Stefan, tnx fer info and ok abt ur "ground antenna". Here QRN low at this
moment. We should give the dipole (really? don't know) a chance, so from
time to time will listen. I am just testing a simple way to put up fiber
glass masts for a MF-antenne. Our Club intends to have a small fieldday at
29.7.12 - only fer MF.
73
Walter
----- Original Message -----
From: "Stefan Schäfer" <Stefan.Schaefer@iup.uni-heidelberg.de>
To: <rsgb_lf_group@blacksheep.org>
Sent: Saturday, June 30, 2012 2:41 PM
Subject: LF: An asymmetric feeded full wave dipole for the 630m band
MF,
Another thing. Right now it is 32 °C here. Best place it to stay on the
beach or on the top of a hill in the forest. Today i choose the forest.
Accidentally there is my 700m (ish) long earth antenna which has an
average height above ground of 8m. Today i want to use it as a dipole
for the 630m band. The feed point is somewhere in the middle but not
exactly known.
What will the efficiency and radiation pattern be? Is it a dipole or
what? EZNEC says it will have 10 Ohm Z=R at resonance (Cu losses +
"typical" ground losses).
The WX forcast says there will be much QRN in the evening, anyway.
Maybe someone can listen from time to time on 476.5 kHz? I will listen
on the band (+ 500 kHz +-) too and maybe a QSO is possible. Who knows...
If the antenna behaves as a dipole it should radiate E/W, so good
chances for UK, PA and DF6NM, DJ2LF...
I'll start now and may be "QRV" in 2 hours or so.
Here, the first time my PA will operate in /p. Nice that it is smaller
than a VHS video cassette and allows to generate QRP at high efficiency!
73, CU, Stefan/DK7FC