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References: <522FF986.5010103@virginbroadband.com.au>
Message-ID: <1378890643.59333.YahooMailNeo@web133205.mail.ir2.yahoo.com>
Date: Wed, 11 Sep 2013 10:10:43 +0100 (BST)
From: M0FMT <m0fmt@yahoo.co.uk>
To: "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@blacksheep.org>
In-Reply-To: <522FF986.5010103@virginbroadband.com.au>
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Subject: Re: LF: Radio signals
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Hi =0A=A0=0ANon linearity in the first RX stage? Caused by a fault in the s=
tage or over driving of the stage.Or some very bad corrosion in the joints =
of the antenna leads. etc etc. Check your RX,=A0 try fitting an attenuator =
in the antenna lead or shorten your antenna.=0A=A0=0AOr for a more esoteric=
 explanation http://en.wikipedia.org/wiki/Luxemburg%E2%80%93Gorky_effect=0A=
=0A73 es GL Pete M0FMT IO91UX=0A=0A=0A________________________________=0A F=
rom: edgar <edgarjtwining@virginbroadband.com.au>=0ATo: "600m@yahoogroups.c=
om" <600m@yahoogroups.com>; "rsgb_lf_group@blacksheep.org" <rsgb_lf_group@b=
lacksheep.org> =0ASent: Wednesday, 11 September 2013, 6:03=0ASubject: LF: R=
adio signals=0A  =0A=0AHi Group,=0A=0AWhat is the mechanism for the way rad=
io signals combine in the air?=0A=0AFor example=0A=0A1.There are two transm=
itters each sending out the same fixed frequency =0Asine wave signal.=0A=0A=
2. There are no other signals in space, and no background noise.=0A=0A3. Th=
ere are no propagation factors modifying the signals.=0A=0Ae.g. buildings, =
ionosphere layers.=0A=0A4. Both transmitters are the same distance from the=
 receiver.=0A=0A5. Both signals have the same polarisation.=0A=0AHow have t=
he signals combined when they reach a receiving antenna at a =0Areasonable =
distance from both transmitters?=0A=0AIt the process addition, multiplicati=
on or some other process?=0A=0ARegards, Edgar=0AMoonah, Tasmania.
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<html><body><div style=3D"color:#000; background-color:#fff; font-family:ar=
ial, helvetica, sans-serif;font-size:12pt"><div><span>Hi </span></div><div>=
<span></span>&nbsp;</div><div><span>Non linearity in the first RX stage? Ca=
used by a fault in the stage or over driving of the stage.Or some very bad =
corrosion in the joints of the antenna leads. etc etc. Check your RX,&nbsp;=
 try fitting an attenuator in the antenna lead or shorten your antenna.</sp=
an></div><div><span></span>&nbsp;</div><div><span>Or for <var id=3D"yui-ie-=
cursor"></var>a more esoteric explanation <a href=3D"http://en.wikipedia.or=
g/wiki/Luxemburg%E2%80%93Gorky_effect">http://en.wikipedia.org/wiki/Luxembu=
rg%E2%80%93Gorky_effect</a></span><br></div><div>73 es GL Pete M0FMT IO91UX=
</div><br>  <div style=3D"font-family: arial, helvetica, sans-serif; font-s=
ize: 12pt;"> <div style=3D"font-family: times new roman, new york, times, s=
erif; font-size: 12pt;"> <div dir=3D"ltr"> <div class=3D"hr" style=3D"margi=
n: 5px
 0px; padding: 0px; border: 1px solid rgb(204, 204, 204); height: 0px; line=
-height: 0; font-size: 0px;" contenteditable=3D"false" readonly=3D"true"></=
div>  <font face=3D"Arial" size=3D"2"> <b><span style=3D"font-weight: bold;=
">From:</span></b> edgar &lt;edgarjtwining@virginbroadband.com.au&gt;<br> <=
b><span style=3D"font-weight: bold;">To:</span></b> "600m@yahoogroups.com" =
&lt;600m@yahoogroups.com&gt;; "rsgb_lf_group@blacksheep.org" &lt;rsgb_lf_gr=
oup@blacksheep.org&gt; <br> <b><span style=3D"font-weight: bold;">Sent:</sp=
an></b> Wednesday, 11 September 2013, 6:03<br> <b><span style=3D"font-weigh=
t: bold;">Subject:</span></b> LF: Radio signals<br> </font> </div> <div cla=
ss=3D"y_msg_container"><br>Hi Group,<br><br>What is the mechanism for the w=
ay radio signals combine in the air?<br><br>For example<br><br>1.There are =
two transmitters each sending out the same fixed frequency <br>sine wave si=
gnal.<br><br>2. There are no other signals in space, and no background
 noise.<br><br>3. There are no propagation factors modifying the signals.<b=
r><br>e.g. buildings, ionosphere layers.<br><br>4. Both transmitters are th=
e same distance from the receiver.<br><br>5. Both signals have the same pol=
arisation.<br><br>How have the signals combined when they reach a receiving=
 antenna at a <br>reasonable distance from both transmitters?<br><br>It the=
 process addition, multiplication or some other process?<br><br>Regards, Ed=
gar<br>Moonah, Tasmania.<br><br><br><br><br><br><br><br><br></div> </div> <=
/div>  </div></body></html>
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