How are the Baltimore riots going?/Any way we can help?

[Georgi Guninski]

On Sun, May 03, 2015 at 08:51:02PM +0000, jim bell wrote:
> >removing the battery may vary among devices. Snowden told people
> >visiting him in Hong Kong to put their phones in the refrigerator, which
> >is a Faraday cage. Also, using a bag is arguably less hassle than
> >removing the battery.
> For an RF-shield, I think that using a microwave oven would be much superior to a refrigerator.  By definition, a microwave oven is designed to contain a huge (1 kilowatt) emission of 2.45 GHz signal (close to those of cell phone frequencies, some are 1700-1900 MHz), so that humans can live with reasonable safety a foot or so away from it.  This implies a shielding of around 60 decibels.I'd keep a container of water inside the microwave cavity to absorb emitted microwave-band signals.  (And, of course, you should detach the power-cord of the microwave, to avoid accidently frying your valuable electronics.)As for smartphones, my understanding is that most of them don't have detachable batteries.  They do, however, have "airplane-mode" function, where (presumably) they are set to not emit any signals in any band.  That doesn't mean they couldn't hear, or record, audio, or detect RF signals, for recording and later transmission. 
>       Jim Bell   N7IJS             Proudly standing as the LAST "Tech-Plus" Ham (Amateur Radio Operator) in the World.
>


For maximum safety: ;)

1. Put the phone in airplane mode
2. Physically remove the battery
3. Put the phone in tinfoil faraday cage as explained here
4. Put the faraday cage in the microwave oven

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