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Roger that, Ron. (Case Proved, Q.E.D.<VBG>) Bill Glaze<br>
<br>
Ron Van Putte wrote:<br>
<blockquote cite="midA615718E-3D8D-11D9-972E-000A27AE0394@cox.net"
type="cite"><br>
<br>
On Nov 23, 2004, at 2:08 PM, John Ferrell wrote:
<br>
<br>
<blockquote><!-- Arial --><font size="-1">Sorry to get picky,
but a Faraday shield is not an electromagnetic field, it is an
electrostatic shield.</font>
<br>
<!-- Arial --><font size="-1"> </font>
<br>
<!-- Arial --><font size="-1">An rf tight room needs the
edges fully bonded together and a Faraday shield requires that they be
insulated.</font>
<br>
<!-- Arial --><font size="-1"> </font>
<br>
<!-- Arial --><font size="-1">I think everyone knows what
is being said, but I felt obliged to add the detail.</font>
<br>
</blockquote>
<br>
Well, I'm glad we got that straightened out. I was going to lose
sleep tonight. <VBG>
<br>
<br>
BTW, RVP doesn't have "Senior Moments", at least I don't remember
having any.
<br>
<br>
Ron Van Putte <br>
<br>
<blockquote><!-- Arial -->----- Original
Message -----
<br>
<!-- Arial --><b>From:</b>
<!-- 0000,0000,EEEE -->Bob
Richards <br>
<b><!-- Arial -->To:</b><!-- Arial -->
<!-- 0000,0000,EEEE --><a class="moz-txt-link-abbreviated" href="mailto:discussion@nsrca.org">discussion@nsrca.org</a> <br>
<b><!-- Arial -->Sent:</b><!-- Arial -->
Monday, November 22, 2004 1:06 PM
<br>
<b><!-- Arial -->Subject:</b><!-- Arial -->
Re: Measuring Surface Flatness (was "Cabinet Grade Particle Board")
<br>
<br>
That's what it is. No RF gets in or out. Something like 110dB
attenuation.
<br>
<br>
Bob.
<br>
<br>
<br>
<b><i>Bill Glaze
<<!-- 0000,0000,EEEE --><a class="moz-txt-link-abbreviated" href="mailto:billglaze@triad.rr.com">billglaze@triad.rr.com</a>></i></b>
wrote:
<br>
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! O:-) )
<br>
Bill Glaze
<br>
<br>
Bob Richards wrote:
<br>
<br>
The ideal material I have seen is used in RF shielded room walls. It
is 3/4" high-density particle board, skinned with galvanized steel on
both sides, maybe 28ga. Very flat, and very smooth. It will bow just a
little, maybe 1/2 inch at the most, when you pick it up from the end.
Came in 4' x 12' as I recall. Don't have any idea where you could
purchase it at a reasonable cost. I was hoping they would have a sheet
of it leftover when they built one of the chambers where I used to
work, but they didn't.
<br>
<br>
Bob Richards.
<br>
<br>
<br>
<b><i>John Ferrell
<!-- 0000,0000,EEEE --><a class="moz-txt-link-rfc2396E" href="mailto:johnferrell@earthlink.net"><johnferrell@earthlink.net></a></i></b>
wrote:
<br>
<!-- Arial --><font size="-1">The test for a Pool Table is
to put a straight edge across it and try to slide a dollar bill under
it.</font>
<br>
<br>
<!-- Arial --><font size="-1">BTW, I am surprised to hear
the talk about using pins. One of the first things Dave Guerin taught
me was to use masking tape instead!</font>
<br>
<br>
John Ferrell
<br>
My Competition is not my enemy!
<br>
<!-- 0000,0000,EEEE --><a class="moz-txt-link-freetext" href="http://DixieNC.US">http://DixieNC.US</a>
<br>
<!-- Arial -->----- Original Message
-----
<br>
<!-- Arial --><b>From:</b>
<!-- 0000,0000,EEEE -->Mark
Grabowski <br>
<b><!-- Arial -->To:</b><!-- Arial -->
<!-- 0000,0000,EEEE -->'<a class="moz-txt-link-abbreviated" href="mailto:discussion@nsrca.org">discussion@nsrca.org</a>' <br>
<b><!-- Arial -->Sent:</b><!-- Arial -->
Friday, November 19, 2004 11:21 AM
<br>
<b><!-- Arial -->Subject:</b><!-- Arial -->
Measuring Surface Flatness (was "Cabinet Grade Particle Board")
<br>
<br>
<br>
<font size="-1">We've seen some great ideas from several folks.
However, a
common element to this discussion is that you need to measure how flat
the surface winds up. What tricks are you guys using to actually
measure how flat the surface is of the bench you just built?</font>
<br>
<br>
<br>
<br>
Bob Richards
<br>
<a class="moz-txt-link-abbreviated" href="mailto:bob@toprudder.com">bob@toprudder.com</a>
<br>
<a class="moz-txt-link-freetext" href="http://www.toprudder.com">http://www.toprudder.com</a>
<br>
</blockquote>
<br>
</blockquote>
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