<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1">
<META content="MSHTML 6.00.2900.2523" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>Now that's funny, Keith,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Ken</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ---</DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=tkeithb@comcast.net href="mailto:tkeithb@comcast.net">Keith Black</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, November 23, 2004 4:31
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Measuring Surface Flatness
(was "Cabinet Grade Particle Board")</DIV>
<DIV><BR></DIV>
<DIV><FONT face=Arial size=2>In other words, if you built your fuse out of
this material you'd probably want to run your antenna externally.
;-)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV>----- Original Message ----- </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=bob@toprudder.com href="mailto:bob@toprudder.com">Bob Richards</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, November 23, 2004 2:59
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Measuring Surface Flatness
(was "Cabinet Grade Particle Board")</DIV>
<DIV><BR></DIV>
<DIV>John,</DIV>
<DIV> </DIV>
<DIV>I disagree. The definition of a "Faraday <STRONG>CAGE</STRONG>",
which is what Bill said, is a completely conductive sealed enclosure.</DIV>
<DIV> </DIV>
<DIV>Also, the edges don't have to be fully bonded together for RF
protection. They can be stitched together at intervals depending on how high
in frequency you want attenuation. The closer the spacing, the higher the
cutoff frequency. Obviously, if you want cutoff up into the gigahertz range,
you pretty much need a continuous bond.</DIV>
<DIV> </DIV>
<DIV><A
href="http://www.boltlightningprotection.com/Elemental_Faraday_Cage.htm">http://www.boltlightningprotection.com/Elemental_Faraday_Cage.htm</A></DIV>
<DIV> </DIV>
<DIV><A
href="http://en.wikipedia.org/wiki/Faraday_cage">http://en.wikipedia.org/wiki/Faraday_cage</A></DIV>
<DIV> </DIV>
<DIV>Bob.</DIV>
<DIV><BR><BR><B><I>John Ferrell <johnferrell@earthlink.net></I></B>
wrote:</DIV>
<BLOCKQUOTE class=replbq
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">
<META content="MSHTML 6.00.2900.2523" name=GENERATOR>
<DIV><FONT face=Arial size=2>Sorry to get picky, but a Faraday shield is
not an electromagnetic field, it is an electrostatic shield. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>An rf tight room needs the edges fully bonded
together and a Faraday shield requires that they be insulated.
</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I think everyone knows what is being said,
but I felt obliged to add the detail. </FONT></DIV>
<DIV> </DIV>
<DIV>John Ferrell <BR>My Competition is not my enemy! <BR><A
href="http://dixienc.us/">http://DixieNC.US</A><BR></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=bob@toprudder.com href="mailto:bob@toprudder.com">Bob
Richards</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">discussion@nsrca.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, November 22, 2004
1:06 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Measuring Surface
Flatness (was "Cabinet Grade Particle Board")</DIV>
<DIV><BR></DIV>
<DIV>That's what it is. No RF gets in or out. Something like 110dB
attenuation.</DIV>
<DIV> </DIV>
<DIV>Bob.</DIV>
<DIV><BR><BR><B><I>Bill Glaze <<A
href="mailto:billglaze@triad.rr.com">billglaze@triad.rr.com</A>></I></B>
wrote:</DIV>
<BLOCKQUOTE class=replbq
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">Bob:<BR>Do
I recall when such a room as you describe was known as a "Faraday
Cage?" Or am I having one of RvP's "Senior Moments?" (No
offense, Ron!<SPAN class=moz-smiley-s14><SPAN> O:-) </SPAN></SPAN>)
<BR>Bill
Glaze<BR><BR></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>