When I was a tech my desk was in a double wall commercial screen room.
The screen was Copper. The door shut into a frame lined with heavy
finger stock. The door latched using a cam.
Commercial screen rooms do use copper screen.
73
Roger (K8RI)
On 12/5/2016 1:19 PM, jimlux wrote:
On 12/5/16 8:55 AM, Grant Saviers wrote:
We built a Faraday cage big enough for an engineer and equipment and
learned that a special screen material is needed. Regular copper
screening has lots of crossovers that aren't really connected or worse
are oxidized contacts and can make the noise worse. A tech was assigned
to solder the wires in strips every 4 inches x,y,z, which took a couple
of days and made for a very unhappy tech. The results were ugly but
RF ok.
You want "welded screen" as opposed to "woven screen" - standard steel
hardware cloth would probably work.
"real" screen rooms are made with aluminum or galvanized steel sheet
(which is probably cheaper than screen, and a whole lot easier to make
sure it connects to everything).
I don't see a benefit for a station. IMO, it's a better use of time to
concentrate on a good building perimeter ground, the entry plate, good
chokes, and insuring no RFI sources from equipment inside the building.
Indeed...
And you will find it very inconvenient that cellphones and VHF/UHF HTs
don't work (or work poorly) in your shack, too. The old shack at JPL
was a building with metal lined walls, and if the door closed, you
can't raise the JPL repeater with a HT.
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73
Roger (K8RI)
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