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<DIV><FONT face=Arial><FONT size=2><FONT face=Verdana size=5>Noise
<B>cancelling</B> phasing circuit</FONT></FONT><FONT face=Verdana
size=5>s.</FONT></FONT></DIV>
<DIV>
<H1>Simple circuit to beat receiver interference </H1>
<P><FONT face=Verdana><STRONG>VU2ATN</STRONG> had been experiencing severe
problems in HF operation owing to continuous interference from passenger lifts
and various power appliances in his QTH which is a part of a large apartment
block. </FONT></P>
<P><FONT face=Verdana>In fact Atanu <STRONG>had even considered giving
up</STRONG> ham radio because he had not been able to copy signals with signal
strength less than +9.</FONT></P>
<P><FONT face=Verdana>What to do?<BR><BR>Well he found an article "AN
INTERFERENCE CANCELLING SYSTEM FOR YOUR RECEIVER OR TRANSCEIVER" by Lloyd Butler
VK5BR on the internet and decided to try the solution.</FONT></P>
<P><FONT face=Verdana>The result?</FONT></P>
<P><FONT face=Verdana>Very encouraging and the cancelling system, using a simple
circuit and a noise antenna, has been working pretty well. </FONT></P>
<P><FONT face=Verdana>Atuna, VU2ATN can reiterate that VK5BR's solution is
really very good and can certainly be copied by city-dwellers like him and still
pursue ham radio.<BR></FONT></P>
<P><FONT face=Verdana>You can read Lloyd VK5BR's article by clicking </FONT><A
href="http://users.tpg.com.au/users/ldbutler/NoiseCancelling.htm"
target=_blank><FONT face=Verdana>here</FONT></A><FONT face=Verdana> </FONT></P>
<P><FONT face=Verdana>Fonte: </FONT><A href="http://www.wia.org.au/"
target=_blank><FONT face=Verdana>Wireless Institute of
Australia</FONT></A></P></DIV></BODY></HTML>