<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<blockquote type="cite">
<pre wrap="">Several posters seem to think that in the USA there are no restrictions
on just listening, e.g.
</pre>
<blockquote type="cite" style="color: #000000;">
<pre wrap="">In the US laws only prohibit active interference, not passive shielding.
</pre>
</blockquote>
<pre wrap="">Have you tried to buy a shortwave radio that covers all of the
frequencies from, say, 100MHz to 10GHz? There are quite a few receivers
that say they do that, until you look at the footnote saying that
reception of certain frequencies is disabled, because the disabled
frequencies are used by some cell 'phones. I admit I don't know where
the law might be, but something is certainly causing all those
manufacturers to remove that capability from their receivers. This
applies to units sold in the USA but built elsewhere as well as those
built here. ....</pre>
</blockquote>
Maybe I did not make my intent clear: I posted a comment that was
intended to address the issue of whether the US put restrictions on
receiving, as distinct from forms of transmission. Several posters
had implied that listening was completely free, and I just meant to
point out that was not so clear. Several have now emailed me to
point out that the examples I gave (e.g. under many circumstances
receiving equipment must not be capable of receiving cell 'phone
transmissions) did not involve Tempest, which I certainly concede,
but that was not what I was talking about. I have worked in "black"
environments and do know a bit about Tempest, but I did not mean to
involve that.<br>
<br>
I am sorry if I did not emphasize that enough, and thus wasted
bandwidth both by my original message and the replies it inspired.<br>
Bob Wilson<br>
</body>
</html>