Re: Cell-Phone signal blocking

Prof. Franz Blaha wrote:
>
> Before the discussion deteriorates even more (if that's possible),
> let me point  out that the OP said s/he understood "they
> are illegal in the us (sic!) but they are available overseas," and
> merely wanted to know if they did what they are supposed to do. It's
> a technical question that interests me as well. For legal/moral
> questions (WHYis it illegal and SHOULD it be illegal?), one could
> start another thread (which I would also be interested in).
>
> Cheers,
>
> Franz
>
> P.S: Sometimes the law really is an ass (with compliments to Charles
> Dickens)

There are jammers that do work. How well, over what distance, and for 
how long depend of course on the performance of particular brands of 
which I'm sure there are several.  The ones that the US Government uses 
(exempt form FCC rules) are probably US made, top quality and top cost. 
The stuff that comes out of China would be more of a crap shoot as 
different factories provide varying quality of design and manufacture.