Faraday Cage

[Ron Van Putte]

On Nov 23, 2004, at 2:08 PM, John Ferrell wrote:

> Sorry to get picky, but a Faraday shield is not an electromagnetic 
> field, it is an electrostatic shield.
>   
> An rf tight room needs the edges fully bonded together and a Faraday 
> shield requires that they be insulated.
>   
> I think everyone knows what is being said, but I felt obliged to add 
> the detail.

Well, I'm glad we got that straightened out.  I was going to lose sleep 
tonight.  <VBG>

BTW, RVP doesn't have "Senior Moments", at least I don't remember 
having any.

Ron Van Putte

> ----- Original Message -----
>  From: Bob Richards
> To: discussion at nsrca.org
> Sent: Monday, November 22, 2004 1:06 PM
> Subject: Re: Measuring Surface Flatness (was "Cabinet Grade Particle 
> Board")
>
> That's what it is. No RF gets in or out. Something like 110dB 
> attenuation.
>  
> Bob.
>
>
> Bill Glaze <billglaze at triad.rr.com> wrote:
> Bob:
> 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:-) )
>  Bill Glaze
>
> Bob Richards wrote:
>
> 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.
>  
> Bob Richards.
>
>
> John Ferrell <johnferrell at earthlink.net> wrote:
> The test for a Pool Table is to put a straight edge across it and try 
> to slide a dollar bill under it.
>  
> 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!
>  
> John Ferrell  
>  My Competition is not my enemy!
>  http://DixieNC.US
> ----- Original Message -----
>  From: Mark Grabowski
> To: 'discussion at nsrca.org'
> Sent: Friday, November 19, 2004 11:21 AM
> Subject: Measuring Surface Flatness (was "Cabinet Grade Particle 
> Board")
>
>
> 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?
>
>
>
> Bob Richards
> bob at toprudder.com
> http://www.toprudder.com
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