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<H1>Stealth antenna for 500 kHz</H1>
<P><FONT face=Tahoma><STRONG>Roger G3XBM</STRONG> has published details of an
unusual stealth antenna for the 500 kHz band.</FONT></P>
<P><FONT face=Tahoma>He writes:</FONT></P>
<P><FONT face=Tahoma>I've been using the earth electrode pair I use on the
sub-9kHz "Dreamers Band" to receive and transmit on 500kHz. </FONT></P>
<P><FONT face=Tahoma>For a diagram of this ultimate "stealth" antenna for 500kHz
and below see my blog at </FONT><A href="http://g3xbm-qrp.blogspot.com/"
target=_blank><FONT face=Tahoma>http://g3xbm-qrp.blogspot.com/</FONT></A><FONT
face=Tahoma> where there is a diagram.</FONT></P>
<P><FONT face=Tahoma>Nowhere is this "stealth antenna" visible as it runs along
a fence 1.5m above the ground and up over a sloping roof for just a few metres.
Most of the radiation seems to be coming from a loop formed within the poor
conductivity chalk soil. This is the same mechanism that allows my 4W 1.8kHz VLF
signal to be copied by ear on an 80cm loop 0.5km away across the
fields.</FONT></P>
<P><FONT face=Tahoma>Best WSPR reports running my 5W out 500kHz transverter
(around 200uW ERP in the best directions) into this oddball "antenna" is -26dB
S/N from G0KTN who is 210km away.</FONT></P>
<P><FONT face=Tahoma>So, try the impossible - sometimes it may just
work.</FONT></P>
<P><FONT face=Tahoma> </FONT></P>
<P><STRONG><EM><FONT face=Tahoma>73 Roger G3XBM</FONT></EM></STRONG></P>
<P><FONT face=Tahoma> </FONT></P>
<P><FONT face=Tahoma>G3XBM Blog<BR></FONT><A
href="http://g3xbm-qrp.blogspot.com/" target=_blank><FONT
face=Tahoma>http://g3xbm-qrp.blogspot.com/</FONT></A></P>
<P><FONT face=Tahoma>G3XBM 500 kHz page<BR></FONT><A
href="http://sites.google.com/site/g3xbmqrp/Home/500k" target=_blank><FONT
face=Tahoma>http://sites.google.com/site/g3xbmqrp/Home/500k</FONT></A></P></BODY></HTML>