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Having heard about the screen cracking problems and just generally wanting to protect my new excalibur I searched the Net for a good case.
I found several online stores and ebay sellers carrying a Black Aluminum Case, i even found it on amazon and the reviews looked pretty good.
The case is pretty much identical to this one, maybe some of you have tried it.
I really like the way Case protects the screen and the phone in general while allowing access to all the keys, and it doesn't look half bad if a little bulky.
Unfortunately the belt clip fell apart after just 2 days use though thats not such a deal breaker but I have also just realized that the case decreases my signal strength, in some situations by 3 bars. That i cannot live with, it sort of ruins the point of having a hard accessible case if you have to keep on taking your phone out of it every time you want to make a call.
This is the most active Excalibur forum i have found (and stuff you guys develop is awesome) and i was just wondering if you guys could recommend a good affordable case. I have found a black plastic case and a lot of leather/cloth ones but after this bad experience i would like to see what you guys have to say first.
Thanks
Just use a rubber case, seems to do the job for me and they are fairly cheap on ebay.
For Fathers Day, I got a black/silver carbon fiber case... looks damn sexy with the black wallpaper on Kavanas ROM. No signal probs at all.
There are other options
Dude, I am dead serious about my phone looking sweet. I can tell you do too, hence the aluminum case. So, here's what you do, go back to ebay and get one of those antenna boosters. It's a freakin strip you put on your battery or something, it's toilet paper thin. It takes up no space. Try it. It might help, and then you wouldn't have to sacrifice the cool case. It's worth a shot.
Plus, unless you have extensively tested this theory. I doubt that your case is making your signal quality go down. Since the signal is transmitted so far away and makes it through so many metallic and non-metallic obstacles, yet your phone picks it up. Now, it does all of that, and you think that a 20th of an inch of aliminum is going to stop the signal. Maybe, but I would try something else before trashing the case. Just an opinion. Hope this helps.
RoachX said:
Having heard about the screen cracking problems and just generally wanting to protect my new excalibur I searched the Net for a good case.
I found several online stores and ebay sellers carrying a Black Aluminum Case, i even found it on amazon and the reviews looked pretty good.
The case is pretty much identical to this one, maybe some of you have tried it.
I really like the way Case protects the screen and the phone in general while allowing access to all the keys, and it doesn't look half bad if a little bulky.
Unfortunately the belt clip fell apart after just 2 days use though thats not such a deal breaker but I have also just realized that the case decreases my signal strength, in some situations by 3 bars. That i cannot live with, it sort of ruins the point of having a hard accessible case if you have to keep on taking your phone out of it every time you want to make a call.
This is the most active Excalibur forum i have found (and stuff you guys develop is awesome) and i was just wondering if you guys could recommend a good affordable case. I have found a black plastic case and a lot of leather/cloth ones but after this bad experience i would like to see what you guys have to say first.
Thanks
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outerdepth said:
Since the signal is transmitted so far away and makes it through so many metallic and non-metallic obstacles, yet your phone picks it up. Now, it does all of that, and you think that a 20th of an inch of aliminum is going to stop the signal.
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Exceptional point!
I have a black aluminum case as well... my signal is just fine...
outerdepth said:
Plus, unless you have extensively tested this theory. I doubt that your case is making your signal quality go down. Since the signal is transmitted so far away and makes it through so many metallic and non-metallic obstacles, yet your phone picks it up. Now, it does all of that, and you think that a 20th of an inch of aliminum is going to stop the signal. Maybe, but I would try something else before trashing the case. Just an opinion. Hope this helps.
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I have tried it out in numerous situations, there are of course some situations where i get full bars with the case or with out but there are many (including my home) where with the case i will get 1 -2 bars and seconds after taking it out of the case the signal will go up by 2 or 3 bars. Put in the case, wait a couple of seconds and again the down to 1 - 2 bars. I didn't think a thin sheet of aluminium would effect the signal either, maybe its the lining or even the finish on the case.
Don't those signal boosters eat up the battery?
jacknmary said:
For Fathers Day, I got a black/silver carbon fiber case... looks damn sexy with the black wallpaper on Kavanas ROM. No signal probs at all.
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You wouldn't happen to have any links to that product?
Im sorry...I bought it at the local mall. A phone accessory vendor had it. cost me 20, and I'd be happy to pick one up for you if you wanted to paypal the cash.
Ill post a pic soon...
jacknmary said:
Exceptional point!
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Yes.. it sounds good! But, not a very educated point that's for sure... hehe
outerdepth said:
Dude, I am dead serious about my phone looking sweet. I can tell you do too, hence the aluminum case. So, here's what you do, go back to ebay and get one of those antenna boosters. It's a freakin strip you put on your battery or something, it's toilet paper thin. It takes up no space. Try it. It might help, and then you wouldn't have to sacrifice the cool case. It's worth a shot.
Plus, unless you have extensively tested this theory. I doubt that your case is making your signal quality go down. Since the signal is transmitted so far away and makes it through so many metallic and non-metallic obstacles, yet your phone picks it up. Now, it does all of that, and you think that a 20th of an inch of aliminum is going to stop the signal. Maybe, but I would try something else before trashing the case. Just an opinion. Hope this helps.
Click to expand...
Click to collapse
The battery booster idea... yeah. Not happening. Unless you engineer a way to actually improve the phone's internal "antenna" with that sticker (because that's all it is), it's not going to improve anything, but maybe make your battery door wobble less.
The way cell phones transmit their signals is a little different... Our phones don't emit radiowaves with a lot of power. The receiving towers have very high gain amplifiers that amplify these incoming signal VERY much in order to make them usable, and send them out to our phones at a very high power. If our phones emitted with the same wattage, we'd probably have brain cancer in a month. That's why it's important to look at SAR values when shopping for a phone. Our Excaliburs aren't too bad in that category...
You'll notice that ALL mettalic phones have a plastic panel SOMEWHERE on the case. The Iphone for example... black plastic at the bottom. The LG Shine which is all stainless steel, has a plastic cap at the top. These areas is where the antenna "array" is mounted. Why ? Because a mettalic case around it will effectively BLOCK the signal. Our Excalibur's antenna is at the top of phone, so make that area is clear of metallic obstructions in order to get a good signal
Oh and a piece of 1/20 inch aluminum will definitely STOP the signal IF it covers the phone all the way around. It acts like a cage for it. This is why when you open up a phone, you'll see these metal panels over the various radio chips on the phone's motherboard. They're put there to block radio interferance. Now if his case has holes in it, that's where the signal gets in , to the antenna. If those "holes" arent strategically placed, it will make radio waves not reach the antenna at full power, thus making his signal bars drop...
hmmmm.... i use a metal case that completely covers my phone (top included) and i have absolutely no loss in signal strength.... There are currently two types of metal cases for the HTC Excalibur (excluding colors) with minor diffferences between the two:
this one: http://www.pdair.com/catalog/product_info.php?cPath=10100000_900000_11000048&products_id=5295#thumb , which the top is left open and the edging around the keys are weird (i've owned this one and it sucks cuz your phone has a tendency to slide around)
and this one: http://www.ids.hk/item_detail.asp?C...e&itemID=40D714A9-0AFE-473B-A1D7-6346E7A8AF39 , this is the one i own ( albeit not from that site ) the entire top is covered. and the edging around the keys is a lot better.
Specifically all these cases sell with tag names: Monaco Aluminum Case, Metal Case, Metal Deluxe Case. and Innopocket Metal Case.
The one titled Innopocket Metal Case is the one you're going to want to get. It fits the phone better. and is better constructed.
I have the exact case posted in the opening thread (Monaco with open top). The Dash can move around a little but I am comfortable with this because it helps with screen adjustment depending on your angle of use. I never use the belt clip. I just orient it a certain way and use the original Dash belt holder (extra protection). I like the cool feel of the aluminum vs. the rubbery feel of the Dash. Also unlike the Dash, the aluminum case has little feet to better release sound and help with cooling when lying flat.
In any case I get great signals with or without the case in my area. But I have a friend that has like two levels of screens and mesh on the windows and doors. Kind of like the stuff high tech companies put on the windows to prevent signal theft of computer processors and such. If I open the case inside my signal strength does increase. But I don't complain because many cant even get a signal inside. So I guess it's true that under some circumstances, even the open top aluminum case impedes signal strength.
outerdepth said:
... and you think that a 20th of an inch of aliminum is going to stop the signal. Maybe, but I would try something else before trashing the case. Just an opinion. Hope this helps.
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Guess you've never thought of how a coaxial cable works (Cable TV). The shield on that cable is much smaller than 1/20th in. and it seems to do a pretty good job of keeping foreign signals out.
jacknmary said:
For Fathers Day, I got a black/silver carbon fiber case... looks damn sexy with the black wallpaper on Kavanas ROM. No signal probs at all.
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Click to collapse
oh wow i had an exact case for my dash when i had it
pudgedaddy said:
hmmmm.... i use a metal case that completely covers my phone (top included) and i have absolutely no loss in signal strength.... There are currently two types of metal cases for the HTC Excalibur (excluding colors) with minor diffferences between the two:
this one: http://www.pdair.com/catalog/product_info.php?cPath=10100000_900000_11000048&products_id=5295#thumb , which the top is left open and the edging around the keys are weird (i've owned this one and it sucks cuz your phone has a tendency to slide around)
and this one: http://www.ids.hk/item_detail.asp?C...e&itemID=40D714A9-0AFE-473B-A1D7-6346E7A8AF39 , this is the one i own ( albeit not from that site ) the entire top is covered. and the edging around the keys is a lot better.
Specifically all these cases sell with tag names: Monaco Aluminum Case, Metal Case, Metal Deluxe Case. and Innopocket Metal Case.
The one titled Innopocket Metal Case is the one you're going to want to get. It fits the phone better. and is better constructed.
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Click to collapse
The case i have is identical to your first link except the back of my case has less holes (top right of the back). I wonder if making some holes in the same area would help.
How do you find the belt clip for the case you bought? Is it hardy enough for regular use?
Thanks
RoachX said:
The case i have is identical to your first link except the back of my case has less holes (top right of the back). I wonder if making some holes in the same area would help.
How do you find the belt clip for the case you bought? Is it hardy enough for regular use?
Thanks
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Did your case not come with a belt clip? Heck i'd give you 2 two i have if you were down the street from me. I don't use them. Not that i hate the reliability, but i'm very skiddish having "my baby" left out in the open to get lost. But if you're didnt come with one, chances are it would work with any variation. The back of both cases i posted have a screw hole in the miggle of the back of it that a metal nub screws into. Thats what lock onto the clip when its on your belt. Without that screw hole or metal nub, you're dead in the water
Oh it came with a clip, and said clip fell apart after a days use :-(. I'm looking at the version of the case you have the clip mechanism looks different.
I was just trying to help, so sorry if anyone feels mislead.
Well, it would seem that if I want to get a response out of someone, all I should do is say something slightly objectionable, MAN.
A simple no, I don't think that's how it works could have done the job. It's cool I have thick skin. LOL!
I do wanna add, though, that metals do not possess the exact same properties across the board. What I mean is, iron and aluminum are both metals, but aluminum is not magnetic because it is not a ferrous metal such as iron or one of its alloys, steel. I do want to add also, that I understand the radio chip concept and the metal cage placed around it to keep interference out. This does not mean that the chip cage is made of aluminum. I am not saying that it is, but I doubt it. Isn't aluminum used as an antenna for radios? Just saying, you think if it makes a good radio antenna or tv antenna, that it would make a good cellular radio antenna.
OrganicM said:
The battery booster idea... yeah. Not happening. Unless you engineer a way to actually improve the phone's internal "antenna" with that sticker (because that's all it is), it's not going to improve anything, but maybe make your battery door wobble less.
The way cell phones transmit their signals is a little different... Our phones don't emit radiowaves with a lot of power. The receiving towers have very high gain amplifiers that amplify these incoming signal VERY much in order to make them usable, and send them out to our phones at a very high power. If our phones emitted with the same wattage, we'd probably have brain cancer in a month. That's why it's important to look at SAR values when shopping for a phone. Our Excaliburs aren't too bad in that category...
You'll notice that ALL mettalic phones have a plastic panel SOMEWHERE on the case. The Iphone for example... black plastic at the bottom. The LG Shine which is all stainless steel, has a plastic cap at the top. These areas is where the antenna "array" is mounted. Why ? Because a mettalic case around it will effectively BLOCK the signal. Our Excalibur's antenna is at the top of phone, so make that area is clear of metallic obstructions in order to get a good signal
Oh and a piece of 1/20 inch aluminum will definitely STOP the signal IF it covers the phone all the way around. It acts like a cage for it. This is why when you open up a phone, you'll see these metal panels over the various radio chips on the phone's motherboard. They're put there to block radio interferance. Now if his case has holes in it, that's where the signal gets in , to the antenna. If those "holes" arent strategically placed, it will make radio waves not reach the antenna at full power, thus making his signal bars drop...
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Click to collapse
Also, I wasn't expecting this kind of a reponse out of you, xticon, oops, xciton. Wow, very insightful. Could you please explain to me the purpose of this "shield" as far as the coaxial cable is concerned. I always thought it was there as a ground or to create a potential difference for the signal. Guess, I am wrong. Could and would you please clarify, since I appear to be retarded. Thanks, buddy!
xciton said:
Guess you've never thought of how a coaxial cable works (Cable TV). The shield on that cable is much smaller than 1/20th in. and it seems to do a pretty good job of keeping foreign signals out.
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Belt clips attached to the phone always break or come apart somehow. I'm with Pudgedaddy, I would never leave my baby dangling over the edge like that. LOL
Hi. Could anyone tell me, in this pic, where is the radio atenna? Is it the sharp tower on the top of the board, above the camera? If so, could that mean that users are more prone to radiation?
Thanks.
Sure, just buy some anti-radiation patch to cover it up.
May as well put it in a copper-made safe.
Or just take some iodine tablets before you use the phone. (don't mind that cell phones don't make ionzing radiation)
Seriously, there's something called SAR rating, it's as good as it gets for laymen like us. Note that the value is different for US/UK... versions.
If a mobile was giving off radiation then I dont think it matters where the antenna is, its next to your head either way. Anyone worried about stuff like that should keep it at arms length and use handsfree or not buy one
Take more salt
ABC_Universal said:
Take more salt
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IANAP(hysicist), but according to what I've researched after the Japan earthquake, the radiation emitted by cellphones (non-ionizing) is quite different from that of materials for and generated by nuclear fission (ionizing).
Furthermore, taking salts (thus iodine) only helps you from absorbing radioactive iodine (iodine-131) into your body and kill your thyroid. It can not help you stop absorbing radiation.
Hey guys... new member and user here. Just got my first smartphone, Samsung Focus, last thursday. I've got a few other questions but I'll get to the most important ones first.
I just received my new case.. a Monaco aluminum case. I did a lot of research and although there is very little info on this one, it definitely appears to be the most well designed. In the youtube review of it, they noted how the developer specifically cut ports in the case to allow for signal strength to be unaffected.
I just got the case and was thrilled with the fit and everything. but then for the first time since having the phone i'm having messages not sending. however it still says i have good signal reception. i then took the case off and had mixed results. put the case back on and had no issues for a bit.. now i'm having issues again. i have had random bursts of good and bad reception in my room where I am.
So is there possibly an app that tests exact reception strength or something? I'd really like a direct comparison with and without the case. By just looking at my bars up top, they don't seem to be affected with and without the case.
Anyone? Surely there must be a way to determine actual signal strength aside from just the bars up top, no?
If you have a metal case which more or less surrounds your aerial, then you basically have a Faraday Cage
http://en.wikipedia.org/wiki/Faraday_cage
...which will significantly reduce the signal received by the phone. Especially if you are holding it and are well grounded. If you're wearing thick rubber-soled boots, that's a bad ground. If you're barefoot, that's a good one.
Basically a metal case isn't a very good idea for a mobile phone.
Try this:
Dial ##634#
Tap call
You will now be in the diagnosis app
Now type *#32489#
Press the on-screen back button three (3) times
Tap 9 (it will say Antenna/ADC)
The Antenna signal strength number is displayed in -mD. lower numbers indicate better signal stregth (so -60 is a better signal than -100)
Hope this helps!
Sent from my {Samsung Focus} using XDA Windows Phone 7 App
Oscardog777 said:
Try this:
Dial ##634#
Tap call
You will now be in the diagnosis app
Now type *#32489#
Press the on-screen back button three (3) times
Tap 9 (it will say Antenna/ADC)
The Antenna signal strength number is displayed in -mD. lower numbers indicate better signal stregth (so -60 is a better signal than -100)
Hope this helps!
Sent from my {Samsung Focus} using XDA Windows Phone 7 App
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Click to collapse
Hell yes! I knew this forum looked useful. How in God's name do you find that diagnostic menu? AT&T or windows function?
Anyway, I wish I had a second eye with me so I can take down all the numbers and run a hypothesis test on the sets of data.
However, just by observations over about 2 minute periods, I see no discernible difference between case and no case. Without the case, the db level seemed to average around 94-95 with a standard deviation of about 10.
If anything, the case seemed to improve reception, though I doubt there's any real truth to it. The reception seemed to average exactly the same as without the case, except I experienced less stray values jumping up in the 100's as I noticed without the case. Overall, I'd probably just list those values as outliers as I would probably just contribute them to the incoming signal itself.
I'll try testing again in another location.. however, as of right now, it appears the myth is busted that this case has any impact on signal strength.
Thanks so much for the help!
How in God's name do you find that diagnostic menu? AT&T or windows function?
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Thats what these bad-asses do around here. LOL
cgibsong002 said:
Hell yes! I knew this forum looked useful. How in God's name do you find that diagnostic menu? AT&T or windows function?
Anyway, I wish I had a second eye with me so I can take down all the numbers and run a hypothesis test on the sets of data.
However, just by observations over about 2 minute periods, I see no discernible difference between case and no case. Without the case, the db level seemed to average around 94-95 with a standard deviation of about 10.
If anything, the case seemed to improve reception, though I doubt there's any real truth to it. The reception seemed to average exactly the same as without the case, except I experienced less stray values jumping up in the 100's as I noticed without the case. Overall, I'd probably just list those values as outliers as I would probably just contribute them to the incoming signal itself.
I'll try testing again in another location.. however, as of right now, it appears the myth is busted that this case has any impact on signal strength.
Thanks so much for the help!
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Click to collapse
Welcome! Keep in mind that signal strength is affected by many variables such as location, how you hold the phone, time of day, how far away you are from the tower serving your phone, even the weather.
Oscardog777 said:
Welcome! Keep in mind that signal strength is affected by many variables such as location, how you hold the phone, time of day, how far away you are from the tower serving your phone, even the weather.
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Click to collapse
Yes.. of course. But my goal was to figure out whether or not my awesome new case was hindering signal strength. I tested it with and without the case while in the exact same resting position, as well as the same position with my holding the phone. I also did it multiple times to try to factor in periodic surges in signal strength.
Definitely makes no difference... possibly even better with the case.
And, by the way, does anyone else have this case? I'd have to say it's definitely the top case out there for the Samsung Focus. It offers much better protection than any others (open screen cases that is), while providing great access to all side buttons, and not looking nearly as ugly as most of them (Case Mate!).
Only two grips.
1. Why hinged? Why not just snap on like all the others? The hinge and clip barely add any bulk, but still they are not necessary.
2. Could use just a bit more screen room on the sides and top of the screen. maybe a few mm on the sides and a centimeter or so up top. But I'll gladly take that for the protection this thing provides.
Hi there, I am currently making a magnetic floatation holder compatible with any android phone. I recently came across these threads and was wondering if anybody knew how I could shield the internal apparatus from magnetic interference? The phones are currently floating in mid air within the holder box but they refuse to function correctly due to the immensely powerful magnetic field surrounding it. Any advise at all would be greatly appreciated?
Have you tried a rubber lining? That may help...
Tried many linings
Hi, thanks for the speedy response. I have tried everything from Aerospace Aluminium, plastic, rubber and Titanium. The only material that currently works is lead and that has to be 3mm thick which makes it way too heavy. If there is maybe anyone you know that could literally coat each mechanism and distribution board within the device with lead that would be great but also impractical for multiple cellphone compatibility. I am sooo close but yet soo far. I have managed to adjust the magnetic frequency to allow minimal interference but it still leads variable damage in multiple areas. I have recently applied for a patent but I pray I can find an unknown material. I am just missing something but cannot put my finger on it. Anyways thanks for your kind response but I am 2 minutes away from burning everything......Sooo frustrating. If you come up with any ideas pweeez let me know, my brain is fried.
Thanks Guys and Dols
Thanks for your help KT, I managed to get in touch with one of the guys responsible for Maglev train magnetic composite technologies and he agreed to help me for a small percentage of total profits. It will be ready about March next year for initial testing, maybe you guys at XDA can use a few 1hundred units for testing? It seems to me this is the best arena to get a feel for the product? Thanks anyway, I will be looking into it.
???
I'm extremely confused to why u would need this... Even more confused about how u would market them...
Great Toy, Looks Alien.
Don't you just hate scratched cellphone/tablet screens. Well now(4months time in S.A) you can simply throw your phone into the invisible magnetic field and when there is no contact with the ground your face cannot be scratched. When you get into your car, simply plug it into your sig lighter and your phone etc can be held in mid air. No more key scratches, no more make-up marks on your device. And it looks really space age, your glowing Android etc phone hovering in mid air. And it will also charge automatically while in the magnetic spectrum. Use it as a night clock/light and place it on(or rather over) your night stand table.
Well at least I hope people would use this because I have spent an infinite amount of time and energy, not to mention hard capital, on this adventure of mine. The ride has been great and tough at times but hopefully the law of thermodynamics will ensure at least a 60% return on energy invested. The guys at Maglev where ecstatic so I am sure they would not help me out as they have unless they knew it was a sure bet. Anyways, thanks for the constructive criticism.
chop007 said:
Don't you just hate scratched cellphone/tablet screens. Well now(4months time in S.A) you can simply throw your phone into the invisible magnetic field and when there is no contact with the ground your face cannot be scratched. When you get into your car, simply plug it into your sig lighter and your phone etc can be held in mid air. No more key scratches, no more make-up marks on your device. And it looks really space age, your glowing Android etc phone hovering in mid air. And it will also charge automatically while in the magnetic spectrum. Use it as a night clock/light and place it on(or rather over) your night stand table.
Well at least I hope people would use this because I have spent an infinite amount of time and energy, not to mention hard capital, on this adventure of mine. The ride has been great and tough at times but hopefully the law of thermodynamics will ensure at least a 60% return on energy invested. The guys at Maglev where ecstatic so I am sure they would not help me out as they have unless they knew it was a sure bet. Anyways, thanks for the constructive criticism.
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Click to collapse
My 2c (worth even less )
It sounds very cool, and very techy and geeky, however I don't know if I see the mass market potential for this type of device?
Also I have a couple of questions:
Does the phone hold its position once placed in the magnetic field? Or is it able to rotate freely?
What about the potential effects on wristwatches and other non sheilded devices? I don't want to put my phone in a mag field and have my watch go blank.
That being said I wish you luck - hopefully I'm wrong and you can retire on this idea
Spot On
You are absolutely correct, containment, extrapolation, dispersion on a lateral effect and cross intensification are issues that are currently being worked on. As of yet nobody in S.A has the mechanical techniques nor tools that I require to enclose the radial disturbance, only one company in Germany can manage the calibration needed. And this has only recently been developed through discoveries made on the Large Hadron Collider. Fortunately, the guys at Maglev's, ITSC, have a ready made and diverse magnetic operating coil for my device. With ought going into all the technical babble, I have got a free travel package to Germany next month and they say my mind will be blown away when I see the solution they came up with. And, retirement, no way, my brain could not handle being idle for 5 seconds. These guys are brilliant, I gave them blueprints a week ago and they already have a model I need to sign off on. So I am sure all your devices will not be affected in any way. Gonna hit the waves now, have not surfed in 3weeks. I hope I can count on xda to distribute a few working units when I get back? When you guys O.K a device, it's future is certain.....
I'm a novice so this might be stupid. Your focus seems to be on insulation. Have you tried going the opposite way? Maybe construct some sort of golden faraday cage?
Also, If I got one of those testing units, that would be tits.
im not certian a faraday cage would work. but it would definately be worth trying, not gold though (gold wont conduct magentic flux very well), ferrite, iron, anything that conducts magnetism very well with very little remaining magnetic field when the source is removed (there is a property specified for that, but i cant remember the name). had part would be covering the screen and not being an eyesore. im not gonna watch the thread so OP can pm me for a bit more info if they wish.
any snap shots i know it might be a no but i really want to see this very intrested
Hey sorry, been out of town for a few days. No problem, as soon as I got the reworked casings in place I can send you a pic. Just a tad dicey at the moment due to copy right etc. Oh and brilliant, the Faraday cage worked perfectly in my initial testing +-1year ago but it blocked the entire device off and stopped easy insertion of the phone. All the kinks are pretty much sorted, you can throw the phone from 3metres away and the field will capture it. Received a vid from MGLEV tests, it was lank hilarious, I am so stoked my baby is almost sorted. thanks guys for input, how can I get in touch with xda management, want to organize initial releases for +- 1000 members? Just require delivery reception details and a few agreements, no cost to you at xda at all? Thank you, God Bless.
I think this guy is screwing with us. He sound like a back to the future movie.
And you waited all this time to tell us? (read the last date it was posted).
I see what you mean though, kinda too good to be true or, at least, too expensive to buy commercially
This is not too good to be true. The magnetic levitation technique has been demonstrated even with living beings in lab. There are adornments in market that float in free air with magnetic levitation.
http://www.google.com/search?source...pw.r_cp.&fp=200a4278d8f8f451&biw=1024&bih=655
However, I guess it's far fetched to use it for cellphones since the inteference and damage to components will be too high. However, I doubt the authenticity of this post as MagLev trains have little in their design that'd help shielding a mobile phone.
If scratched surfaces annoy you, use a woolen holder.
hmmm any updates?
I'd love to do testing; got like 4 different phones to test with
Hi, I searched and cannot find this topic anywhere, but I had an idea and I'm wondering if its dumb. Also not sure if this is the right place for it.
Betavoltaic batteries are batteries that use nuclear decay to generate power. They do this somewhat like solar panels, only the nuclear material is emitting beta particales, or rather, electrons. And a semiconducting material is used to collect the electrons and turn it into usable current. Right now they are looking at using them for pace maker batteries because the material they use is safe.
Tritium is the material they will use, the beta particles it emits cannot penetrate a piece of paper let alone skin so it is safe unless ingested. Tritium has a half life of 12 years, so they would be useful for at least 6 years. And they can be made small or large.
Could we use a betavoltaic battery to keep our phones charged? Now I know that it would be difficult to generate enough power to run the phone on betavoltaics alone, the output is very small, but what if we had a 500-1000mah battery tied into a betavoltaic battery that would trickle charge the battery when not in use?
Or maybe even just make a extended case like we have now, that have batteries in them, only its betavoltaic!
I'm just imagining never plugging in my phone again, just leaving on my bed stand, its charging away, and in my pocket all day long, charging away.
I LOVE this thought, if it were possible!
I know I could have explained this a lot better, but do you get the idea? Does someone who is more knowledgeable than myself have any comments or criticism as to how it would work? Could work? Or wouldn't work?
Thanks for your time,
-Tom
EDIT: looking closer at THIS source I listed, I realized a company already had the idea for this battery for use in cell phones. But their website is down :/
Some sources: http://peswiki.com/energy/PowerPedia:Beta_voltaic
http://peswiki.com/energy/Directory:BetaVoltaics
http://en.wikipedia.org/wiki/Betavoltaics
I know it is long but please read everything before replying
Initially, the idea sounds extremely dangerous. What if the battery is opened or falls apart and the nuclear substance falls out? You will have to quarantine the area. Looking deeper, when a substance undergoes nuclear decay, it releases a range of three things: alpha, beta and gamma. These things are quite dangerous. You mentioned beta, which is identical to an electron. If this is fired at you, it could ionize an atom in your body and this can lead to a range of things like death, prolonged critical illness etc.
You are wrong about the tritium part. All substances give off three ranges of things like I mentioned. Beta will always penetrate through a lot of things. It is alpha that won't. You may have confused the two. Alpha was the substance used to kill the Russian ambassador a while back. He ingested it and died. And it cannot be traced since it is distributed by the digestive system and cannot penetrate so cannot be detected outside the body.
Theoretically, the idea is fullproof. But it doesn't seem practical AT THE MOMENT. Maybe later on. I assume they are still working on the idea. I mean, they are working on wireless charging for gawd sake. It won't be long since this concept is a reality.
Thankyou very much for the post Tom. It feels great to reaccess the science I learnt in school. Please do not be offended by the "YOU ARE WRONG" part. Only trying to help you to improve. You may want to research into the science first. I just get a bit picky at these sort of things. After having a quick look over my stuff I could spot a few errors.
You were unlucky to get someone like me to reply with my nerdy science
Never thought I would discuss this in an Android forum though.
Hit thanks if you found this useful
Thank you very much for your reply, I did not realize there was so much to it! I'm mobile right now, but I will respond more fully when I get home tonight. I'm not offended at all, I'm glad someone more knowledgeable can explain it to me and others who might search for the same question.
Sent from my Galaxy Note running ICS with JfMod, using xda app
What a load of bull.. misinformation and paranoia. Let's start from the top.
Deftone said:
What if the battery is opened or falls apart and the nuclear substance falls out?
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It's quite easy to enclose battery (or at least radioactive part) in such a way that it's at least very hard compromise the shielding. Full metal casing and you are done.
Deftone said:
You will have to quarantine the area.
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Another false statement. It's not a nuclear fallout from A-bomb or powerplant-gone-wrong that spreads with the wind. It's usually solid piece of material, I can't imagine anyone building battery with amount of radioactive material that needed more than couple of meters to be safe. Tritium is a gas (isotope of hydrogen) and if released would quickly dissipate and be harmless. You can buy keychains filled with tritium so they glow.
Deftone said:
Looking deeper, when a substance undergoes nuclear decay, it releases a range of three things: alpha, beta and gamma. These things are quite dangerous. You mentioned beta, which is identical to an electron. If this is fired at you, it could ionize an atom in your body and this can lead to a range of things like death, prolonged critical illness etc. You are wrong about the tritium part. All substances give off three ranges of things like I mentioned. Beta will always penetrate through a lot of things. It is alpha that won't. You may have confused the two.
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When substance undergoes decay it CAN release ONE OR MORE of the three types of radiation you mentioned. Not all nuclear decay processes produces all three.
Alpha particle is helium nucleus, that is two protons and two neutrons
Beta particle IS an electron
Gamma is high energy photon
There is also (often ignored but no less dangerous) neutron radiation (stream of neutrons)
While you are right that it COULD ionize an atom in body, that's no big deal. If it damages DNA it has CHANCE of causing some form of cancer. Other than that worst case scenario is that affected cell dies and is replaced by another. Of course if radiation intensity is high enough it can cause radiation poisoning, but again I don't believe anyone would build battery that would contain enough radioactive material to cause that unless eaten.
YOU are wrong about the tritium. It can't produce alpha radiation since one alpha particle is bigger than entire tritium atom. Only things that tritium produces during its natural decay (not to be mistaken with forced fussion like in hydrogen bomb) is Helium-3 ion, electron (beta radiation) and antyneutrino which is harmless since it almost does not interact with normal matter.
Deftone said:
Alpha was the substance used to kill the Russian ambassador a while back. He ingested it and died. And it cannot be traced since it is distributed by the digestive system and cannot penetrate so cannot be detected outside the body.
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I'm assuming that you are refering to poisoning of Alexander Litvinenko, KGB agent that fled to UK? He wasn't killed by some "alpha substance" but by polonium-210, radioactive isotope. It can be quite easily traced since investigators of the case discovered who brought it to UK, where and when it was produced and where it was given to target. On the other hand it's true that it's quite hard to diagnose. Half-life of polonium is about 140 days, so it's a lot more active than tritium that has 12 year half life.
Deftone said:
Theoretically, the idea is fullproof. But it doesn't seem practical AT THE MOMENT. Maybe later on. I assume they are still working on the idea. I mean, they are working on wireless charging for gawd sake. It won't be long since this concept is a reality.
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This concept is a reality for a long time now. Nuclear batteries (betavoltaic ones) are in service since 1973 in peacemakers. The only problem is that they have very low output and efficiency.
Deftone said:
Thankyou very much for the post Tom. It feels great to reaccess the science I learnt in school. (I am actually still using this level of science in university). Please do not be offended by the "YOU ARE WRONG" part. Only trying to help you to improve. You may want to research into the science first. I just get a bit picky at these sort of things.
You were unlucky to get someone like me to reply with my nerdy science
Never thought I would discuss this in an Android forum though.
Hit thanks if you found this useful
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I suggest that you sue your school if that's where you learned this. It's quite amusing how you go on about researching the science before posting when you clearly didn't do it yourself.
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Sorry about flaming, but I'm a bit alergic to people using false or inaccurate information to scare people away from nuclear technology.
For low energy beta sources like mentioned tritium lead isn't necessary. Couple milimeters of aluminium is enough.
As for authorities wanting to remove uranium I'm holding - I would like them to remove it. But it wouldn't require bomb squad, just a guy with tongs and shielded container. If such batteries started being mass produced there would have to be provided a way for user to dispose of it safely so that it doesn't end up on landfill. But since there are (at least here in Poland, or rather EU) trashcans specifically for bateries, only some mechanism forcing people to use them would be needed.
The fact that current nuclear batteries are too weak to be practical in mobile devices (or would contain too much radioactive material to be safe if made big enough) doesn't defeat my point at all. I wasn't trying to prove that this is fantastic solution - It's not. I would rather have nuclear reactor in my basement (I read something about Toshiba making self contained nuclear reactors that didn't need servicing, they would only replace whole unit after about five years) and charge my lithium batteries from that. I was just pointing out how much you overreacted about potential risks.
The only two types of nuclear batteries that would be as unsafe as you say are:
thermoelectric batteries (ball of plutonium heating itself up and thermocouples producing energy from that head - Curiosity rover has 4kg of plutonium dioxide providing it with 2kW of power, most deep space probes are powered this way, even some satelites), since they contain big amounts of radioactive materials
optoelectric batteries that contain it's radioactive material in form of fine dust suspended in gas under high pressure - if container would be punctured high velocity jet of this radioactive dust causing contamination. While this type of power generation is more efficient than betavoltaics they are deemed too unsafe to be used anywhere but in space.
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So we are going to have small Chernobyl in our phones? Cant wait for it :d
Sent from my Sony Xperia S rocking JB
POOOOOLSKAAAAA BIALO CZERWONIIII!!!
Very bad idea. Too costly, too dangerous, not enough power. Maybe viable for sat phones for expeditions, but not much else.