D D D
And now a surprise 😯 (by definition unexpected).
https://
I will cite the final questions (some are slightly rhetorical)
And then three questions
Q1. How can arguably the most famous effect in electrical engineering have remained unanalyzed for 180 years?
Q2. How can a big error in the most famous physics textbook ever published have gone unreported since 1964?
Q3. Somebody must design microwave oven doors based on laboratory measurements. Where are these people?
jaclaz
Jaclaz,
Very good points old chum. Very good indeed.
Lets hope that someone, somewhere is doing something about this? I will ask Professor Duffy, next time I see him.
Regards,
Simon
PS Do you like our new faraday wallets, (Card Shield)?
RJudy55
I note from reading the thread that you state you 'co-invented' the portable enclosure?
From your patent, I note that you registered the patent in 2014?
We, (Disklabs) were selling portable shielded bags (with the window), in 2007.
Looking back through emails from 2010, even back then we were discussing the bags and I offered to get your original bags tested for you - which I did.
Hey Simon I didn't mean to say I invented the faraday bag. Obviously that came way before my time. I co-invented the Black Hole Data Bag. The bag with filtered data and power.
I recently released an app for testing faraday bags called, "MD Faraday Bag Tester" for Android. I was thinking you all might find it useful. Not many people have signal analyzers lying around at home, so I hope the app will be the next best way to see how well your bags work.
When you start the app it takes a baseline signal strength reading for WiFi, Cell and BT. You just place place the phone in your faraday enclosure for about 20 seconds, then remove it and let it find the signal again. The app will provide a dB shielding reading and let you know if the signal was completely blocked or not.
Let me know what you think! We'll have an iPhone version shortly as well.
Cheers,
Ryan
MOS Equipment
We simply put the devices in a metal box, together with an USB charger, if the device is in running state. After it arrives to the lab, we open it in our Faraday Cage room.
We did tests as well, so far no signal came in or got out from the metal box )
We simply put the devices in a metal box, together with an USB charger, if the device is in running state. After it arrives to the lab, we open it in our Faraday Cage room.
We did tests as well, so far no signal came in or got out from the metal box )
Perfect.
On a thread where people are discussing about the lack of standards and of dependable, exact, ways of measuring the effectiveness of bags and containers. some vague, unreferenced and anecdotal story was exactly what was missing.
I once put my handy into a surplus ammo box and texted to it several times, and no message went through.
1-1
jaclaz
@jaclaz what is the subject of the post ? I only answered that )
As for standards, Faraday Bags work 100% as they should. In real Faraday Bags there is at least one full metal layer built in them, no signal can pass that.
It is another question why people buy cheap crap bags and they wonder how those won't work as real Faraday Bags?! I don't got answers for this )
@jaclaz what is the subject of the post ? I only answered that )
Not really-really, you just posted some casual and vague report.
How big is your box?
How much does it weigh?
Which metal is it?
Which thickness?
What kind of gasket (if any) it uses?
How it is (if it is) airtight/watertight?
How (EXACTLY) did you solve heating issues (if any)?
How (EXACTLY) did you test its effectiveness?
Do you have any actual data showing wheteher Faradays bags are crappy?
Or crappier than … WHAT?
Waterproof safes are also said to be working (though they may be a tad bit too heavy to be practical for field collection).
jaclaz
jaclaz, I will just answer all your questions
How big is your box?
- The size doesn't matter ) Use the size of a box fitting your needs. Be sure you use a box which is bigger then the device you want to store inside of it )
How much does it weigh?
- If you have to carry it, use one weighty the less possible.
Which metal is it?
- Metal is metal, the purpose is to have the device enclosed and have the box act as an electromagnetic shield. Use an iron box, it is cheap and it would do it.
Which thickness?
- Thickness doesn't matter either, it just has to be 100% continuous, but I measured it for you with a caliper, the boxes I use got 2mm thickness.
What kind of gasket (if any) it uses?
- None, they are perfectly metal-on-metal enclosing.
How it is (if it is) airtight/watertight?
- Use safes for this kind of purpose, I don't think the main purpose of a Faraday Bag or Faraday Cage should be to physically protect a device for this kind of things. We use a branded safe to store the devices while transportation and a big safe in-lab.
How (EXACTLY) did you solve heating issues (if any)?
- No heating issues, the metal box acts as a thermal conductive on it's own for cooling, if needed.
How (EXACTLY) did you test its effectiveness?
- We got so far 100% effectiveness proven from real life.
Do you have any actual data showing wheteher Faradays bags are crappy?
Or crappier than … WHAT?
- There are many bags sold, which are called "Faraday Bags", but in reality they are just antistatic bags, which don't not provide electromagnetic shielding. All those are useless for the purpose of not letting in/out any signals from an active mobile device.
Waterproof safes are also said to be working (though they may be a tad bit too heavy to be practical for field collection).
- That would be overkill, but it would fit the purpose well )
Feedbacks, opinions, comments are welcome. I just use a way, but that doesn't mean that my way is the only way! Right jaclaz ?!