[RFI] RF tight rooms - somewhat OT

[Jim Brown]

On 5/11/2013 8:34 PM, n0tt1 at juno.com wrote:
> My question to the group is what, in your opinion, is the
> best/cheapest RF-tight test room he could build for himself?

Roger has outlined the general concept of a proper screen room.  BUT -- 
many RF interference issues are the result of poor design of the 
equipment involved, as well improper interconnections between the 
equipment and the DUT (device under test), as and can be solved by 
correcting those problems without going to the considerable expense of a 
screen room.

The most common cause of RFI is "The Pin One Problem," followed by poor 
equipment shielding. RFI to shielded balanced twisted pair is often 
caused by Shield-Current-Induced Noise.  My website includes a lot of 
tutorial applications notes on these issues. http://k9yc.com/publish.htm
The Ham's Guide" is the most recent, and covers all of these issues 
except Shield-Current-Induced Noise (SCIN).  See the separate 
audio-related tutorials for SCIN, which is mostly a problem with 
microphone wiring for professional sound systems, but could be a factor 
with instrumentation that uses shielded twisted pair.

73, Jim K9YC