[TowerTalk] Screened walls and floors

[Roger (K8RI) on TT]

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)