Stefan
You are a busy man organising the Hidelburg radio club and now Venezuela
radio club. I have to do everything myself, design, install and climb 100 ft
masts to erect antennas. Are these installations remotely controlled by you
and your team. For awards ARRL policy is that the TX/RX must be at the home
QTH and not remote.
de g3kev
----- Original Message -----
From: "Stefan Schäfer" <[email protected]>
To: <[email protected]>
Sent: Sunday, May 13, 2012 5:08 PM
Subject: LF: Cardioid RX antenna for LF...
> Hello Group,
>
> I've just started to play a bit in EZNEC, trying to simulate a receive
> loop antenna for the new YV7MAE grabber.
> http://dl.dropbox.com/u/74746618/LF/YV7MAE_LF_Grabber.html ... still
> using a wire receive antenna with excellent results but now a
> directional antenna is needed.
>
> So i modelled a loop with a possible shape and a ground connection. Then
> i added a R on the far end of the source. The results of the elevation
> and 3D plot are surprising good. Maybe i have done a mistake in
> modelling? Optimal performance was obtained at R = 8 kOhm. This resulted
> in the best F/B and beamwidth... Results of ZENEC are here:
> http://dl.dropbox.com/u/19882028/LF/Cardioid%20for%20LF.png
>
> Any ideas, experiance or advice?
>
> I guess a preamp is needed when such a antenna is used. The typical 1:9
> un-un does not look useful for me...
>
> 73, Stefan/DK7FC
>
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