Wow, thanks.
This can lead to a lively discussion :-)
I think there are some misunderstandings by VK1OD. He states that Roelof
says that: "noise is mainly magnetic". But Roelof means the local noise
and not the far field noise, e.g. from thunderstorms. That is the
difference! The local noise H fields pass the walls rather than the E
fields, in many constellations like urban areas.
Furthermore there can be a significant advantage in the obtainable SNR
compared to a "big" antenna because that small whip antenna can be
lifted easily by several meters above ground, without having a high wind
load. A big antenna with a feed point at ground level and a few meters
near the house may catch a lot of local noise.
For me, here on the institutes roof, the small whip antenna
(https://dl.dropboxusercontent.com/u/19882028/MF/LFMFprobe.JPG) achieved
MUCH better results than the 70m long wire
(https://dl.dropboxusercontent.com/u/19882028/LF/IUP%20Antenne_resize.jpg)...
73, Stefan/DK7FC
Am 03.07.2013 01:02, schrieb Dimitrios Tsifakis:
Hello group,
here is a web page written by Owen, VK1OD with an analysis of how
PA0RDT's Miniwhip antenna works:
http://vk1od.net/antenna/PA0RDT-MiniWhip/index.htm
You may find this interesting.
73, Dimitris VK1SV
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