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Source of Small Faraday Test Chambers?

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whit3rd
Guest

Sun Jan 08, 2017 6:19 am   



On Saturday, January 7, 2017 at 7:56:49 AM UTC-8, JM wrote:
Quote:
I picked up a few of this type of Faraday cages at an auction (at a
Nokia facility) a few years ago for next to nothing :-

https://www.dropbox.com/s/6azvtcey6cjnfc5/FC1.JPG?dl=0

... I've been trying to find
a source who can supply similar units at reasonable cost.


Not for reasonable cost, alas, but you'll want a welding shop to
build the doorframe, and a plating shop for conductive-surface treatment
for all the aluminum parts. Around here, the old standby
is copper or bronze screen wire on wood frames for shield boxes/rooms.

The nickel-mesh gasket stuff won't be low-cost, either.

Mike Perkins
Guest

Sun Jan 08, 2017 6:39 pm   



On 07/01/2017 15:56, JM wrote:
Quote:
I picked up a few of this type of Faraday cages at an auction (at a
Nokia facility) a few years ago for next to nothing :-

https://www.dropbox.com/s/6azvtcey6cjnfc5/FC1.JPG?dl=0
https://www.dropbox.com/s/c2tjx9aif4w1pjp/FC2.JPG?dl=0
https://www.dropbox.com/s/b78vv3851i7d0sc/FC3.JPG?dl=0

Unfortunately a couple have been (using the polite expression)
"borrowed" by customers, and I'm down to the last one. They are very
useful for testing of analogue prototypes, and I've been trying to find
a source who can supply similar units at reasonable cost.

Any pointers?


A microwave oven?

--
Mike Perkins
Video Solutions Ltd
www.videosolutions.ltd.uk

Chris Jones
Guest

Sun Jan 08, 2017 8:11 pm   



On 08/01/2017 02:56, JM wrote:
Quote:
I picked up a few of this type of Faraday cages at an auction (at a
Nokia facility) a few years ago for next to nothing :-

https://www.dropbox.com/s/6azvtcey6cjnfc5/FC1.JPG?dl=0
https://www.dropbox.com/s/c2tjx9aif4w1pjp/FC2.JPG?dl=0
https://www.dropbox.com/s/b78vv3851i7d0sc/FC3.JPG?dl=0

Unfortunately a couple have been (using the polite expression)
"borrowed" by customers, and I'm down to the last one. They are very
useful for testing of analogue prototypes, and I've been trying to find
a source who can supply similar units at reasonable cost.

Any pointers?


If the consolidation of mobile chipset companies hasn't finished yet
then the best source is probably other auctions like the one you bought
at. The Nvidia lab in the UK that was doing mobile stuff and which shut
down also sold a bunch of things like that, but I couldn't justify the
shipping to where I am.

If you had to make one, then I would start with something like this:
http://www.gainta.com/en/hq035ems.html
It has a mesh gasket, but you would need to add the toggle clamps plus
feedthroughs. Make sure that the box has the "ems" suffix for shielding.
It was re-branded and sold by Farnell and RS but Farnell seems to have
dropped the shielded version and RS has more than doubled the price
recently. The cheapest remaining seems to be Allied.
http://www.alliedelec.com/rs-pro-7683801/70652059/
http://uk.rs-online.com/web/p/general-purpose-enclosures/7683801/
http://uk.farnell.com/multicomp/hq035ems/box-diecast-90x262x182mm-ip67/dp/1857187

Clifford Heath
Guest

Tue Jan 10, 2017 8:10 am   



On 08/01/17 08:26, John Larkin wrote:
Quote:
On Sat, 07 Jan 2017 12:31:34 -0800, Joerg <news_at_analogconsultants.com
wrote:

On 2017-01-07 08:20, pcdhobbs_at_gmail.com wrote:
Butter cookie tins with 33 nF Russian feedthrough caps and SMA F-F bulkhead mount barrels.


I used to do that as well. Blue cans and red cans with the Danish
mermaid on the lid. However, those are not good for the waist line
because someone has to "volunteer" and eat all the contents. I used
American feedthrough caps.


I mostly use 70-mm film cans that I got from Surplus Shed.


Real men use a Fosters can :-)

https://img1.etsystatic.com/055/1/5789651/il_570xN.760155877_4an7.jpg


I assume you dump the beer.

An Australian assured me that they make Fosters for export only, not
to drink themselves.


Before the craft beer movement began, Fosters, Victorian Bitter,
Melbourne Bitter and XXXX, etc were very commonly drunk here. They
seemed ok back in the 80s. I can't tell whether those beers have
changed, or tastes have - both probably. Regardless, the choice of beer
is now more a personal expression of narcissism than actual taste, with
so many nice beers to choose from. I can't remember the last time I had
one of those oldies... but the versions available here are unlikely to
represent the export versions anyhow.

JM
Guest

Thu Jan 12, 2017 3:49 am   



On 07/01/2017 15:56, JM wrote:
Quote:
I picked up a few of this type of Faraday cages at an auction (at a
Nokia facility) a few years ago for next to nothing :-

https://www.dropbox.com/s/6azvtcey6cjnfc5/FC1.JPG?dl=0
https://www.dropbox.com/s/c2tjx9aif4w1pjp/FC2.JPG?dl=0
https://www.dropbox.com/s/b78vv3851i7d0sc/FC3.JPG?dl=0

Unfortunately a couple have been (using the polite expression)
"borrowed" by customers, and I'm down to the last one. They are very
useful for testing of analogue prototypes, and I've been trying to find
a source who can supply similar units at reasonable cost.

Any pointers?


Thanks all for sharing your thoughts. I got a quote at a local machine
shop for making these type of cages and am still recovering from the
shock. I wasn't aware of the original purchase cost of these, so shall
just keep a close eye on the one I have, and be grateful I have it.

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