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Boost a Weak 3G Modem Signal, With a Saucepan

modeca writes "Using only commonly available kitchen equipment this guy demonstrates the amazing powers of an ordinary metal pan to boost the 3G reception of his USB modem. It really seems to work, check the right hand side of the graph in the video." It's not that crazy: cheap antenna boosting (for USB WiFi dongles, Bluetooth, and more) has been elevated to a fine art in New Zealand.

46 of 146 comments (clear)

  1. very scientific by fasuin · · Score: 2, Funny

    isn't it?

    1. Re:very scientific by demonlapin · · Score: 2, Funny

      My favorite sentence that has totally different meanings in US and UK English is "I was so pissed that I couldn't find a fag when I had that torch."

  2. Who knew? by bobdotorg · · Score: 4, Funny

    Who knew that tinfoil hats actually _boosted_ reception. It's a government conspiracy I tell you.

    --
    __ Someday, but not this morning, I'll finally learn to use the preview button.
    1. Re:Who knew? by w0mprat · · Score: 2, Funny

      The solution is to cover your entire body in tin foil, faraday cage!

      --
      After logging in slashdot still does not take you back to the page you were on. It's been that way for 20 years.
    2. Re:Who knew? by drinkypoo · · Score: 5, Informative

      Who knew that tinfoil hats actually _boosted_ reception.

      everyone but you

      --
      "You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
  3. oh, nice. by gandhi_2 · · Score: 5, Funny

    a pantenna.

    1. Re:oh, nice. by moodz · · Score: 5, Funny

      hmmm yes i can see the pot-ential.

    2. Re:oh, nice. by compro01 · · Score: 5, Funny

      I should probably just wok away, but I can't resist.

      --
      upon the advice of my lawyer, i have no sig at this time
    3. Re:oh, nice. by Jophish · · Score: 5, Funny

      Let's not get curried away

    4. Re:oh, nice. by Panoptes · · Score: 4, Funny

      I'm pasta caring.

    5. Re:oh, nice. by Larryish · · Score: 2, Funny

      You are addicted to pot?

    6. Re:oh, nice. by derGoldstein · · Score: 3, Funny

      Such fun with pots and puns.

      --
      Entomologically speaking, the spider is not a bug, it's a feature.
  4. Easily done by earnest+murderer · · Score: 4, Informative

    You can find plans for aluminum foil and cardboard reflectors in many places as well. Here's one now!

    http://www.freeantennas.com/projects/template/

    They work great.

    --
    Platform advocacy is like choosing a favorite severely developmentally disabled child.
  5. New Zeland by Jbcarpen · · Score: 5, Funny

    New Zeland appears to have been Slashdotted.

    --
    GENERATION 667: The first time you see this, copy it into your sig on any forum and add 1 to the generation
    1. Re:New Zeland by dangitman · · Score: 2, Funny

      No, it's Tim Finnland.

      --
      ... and then they built the supercollider.
    2. Re:New Zeland by sentientbeing · · Score: 2, Insightful

      Does it shrink in the heat or something?

      --

      ------
      beware he who would deny you access to information, for in his mind he dreams himself your master
  6. Moola! by Tablizer · · Score: 5, Funny

    I'm gonna buy up 10,000 of those pans and sell them on Ebay as a "Hi-tech USB modem booster" for $69.95. That is until IBM patents the pan.

    1. Re:Moola! by Quiet_Desperation · · Score: 3, Insightful

      That is until IBM patents the pan.

      Take the high road, son.

      Patent the pan before IBM does.

    2. Re:Moola! by Tablizer · · Score: 2, Interesting

      Patent the pan before IBM does.

      Do you really think *I* can compete with IBM's bribery power?
         

  7. Now I am torn by MichaelSmith · · Score: 5, Funny

    Between my liking for my wife's prawn crackers and my need for a good 3G signal.

    1. Re:Now I am torn by Tablizer · · Score: 3, Funny

      Between my liking for my wife's prawn crackers and my need for a good 3G signal.

      Please keep your romantic procedures to yourself.
             

    2. Re:Now I am torn by jpedlow · · Score: 5, Funny

      But with a good 3G connection, you can get all the prawn you can handle!

    3. Re:Now I am torn by MichaelSmith · · Score: 4, Funny

      LOL

      I represent the International Business Machines company....

    4. Re:Now I am torn by dtmos · · Score: 3, Insightful

      my wife's prawn crackers

      If that's not a euphemism, it should be.

  8. Hats off too by Tablizer · · Score: 4, Funny

    It works so well that now I can get all the MacGyver episodes.

  9. Hijacking advantage by macraig · · Score: 2, Interesting

    Isn't the real value here for wifi hijackers? Why park suspiciously outside the house/cafe with an open wifi node when you can snag it from out of sight?

    1. Re:Hijacking advantage by ShooterNeo · · Score: 3, Informative

      Welcome to the club. People have been doing this since wi fi was first publicly available. There are special antennas available that are much better than improvised ones, as well as special wireless radios that are hacked to give a stronger signal. For a long time, everyone was using WEP for security so that basically anyone with the right equipment also had access.

  10. I think I'll start keeping a frypan in my backpack by syousef · · Score: 3, Funny

    Why not? I already have a GPS, mini binoculars, a radio scanner, a flash light, an external hard drive, a 20x zoom camera, multiple cables, a AAA/AA battery fast charger, batteries, a USB r/c flight sim controller (Realflight), a Logitec gamepad, a graphics tablet and a laptop in my backpack. I figure if I ever get into trouble and get searched the authorities will already think I'm some sort of hyper-nerd spy anyway. Heck if I didn't have to face the consequences it would be a laugh to catch a plane and cross into the US with my backpack just to see the look on TSA drone's face. Why not add a frypan to the mix? Now if only I could work out a way to fit a kitchen sink in my backpack.

    --
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  11. Most likely by Tehrasha · · Score: 4, Interesting

    He is probably located in a wifi-dead spot where singals bouncing off various buildings/objects causes some of them to arrive out of phase and cancel out. By placing the antenna in a pan, the signals are only arriving (mostly) from one direction and the out-of-phase signals are being blocked.

    No magic. Just math. He certainly isnt using the pan as a reflector which then would more accurately 'boost' the signal.

    1. Re:Most likely by Mister+Transistor · · Score: 2, Insightful

      Actually it isn't logic, it's physics.

      --
      -- You are in a maze of little, twisty passages, all different... --
    2. Re:Most likely by GrpA · · Score: 3, Informative

      And fairly simple physics at that... The pot attenuates some signals and may even amplify others... The end result is a better S/N ratio and less lost packets due to errors.

      I do the same, except I use a mesh spagetti strainer ( a big sieve ) and I've mounted a USB cable extender just below the focal point... Add my 3G dongle and away I go... up from 1 bar to 4 bars reception and my download speed doubles.

      My neighbor now uses one for his mobile phone and then he uses bluetooth to take the call so he can leave his handset in there.

      They are kind of directional though, but it's very repeatable.

      GrpA

      --
      Enjoy science fiction? "Turing Evolved" - AI, Mecha, Androids and rail-gun battles. What more could you want?
  12. Re:Top This! (no pun intended) by Tehrasha · · Score: 2, Informative

    Yes, we do. It is akin to a full body version of the Jewish yamacha, which is lined with tinfoil of course.

    *facepalm*

  13. Re:I think I'll start keeping a frypan in my backp by gandhi_2 · · Score: 3, Funny

    ...TSA drone's face...

    TSA personnel aren't drones. Drones have been much more effective.

  14. Re:what's going on? by dtmos · · Score: 4, Interesting

    I'm suspecting that the pot is shielding the modem from a nearby source of interference. There's probably 3G signal arriving from above (e.g., from a tower), and it will certainly be scattered by various objets d'home so that some signal will be available from the vertical. Since the modems typically have rancid selectivity, the source of interference doesn't even have to be in the 3G band -- it could be a Wi-Fi access point, microwave oven, or any number of other things.

  15. Pots and pans ain't nothing new... by t0p · · Score: 2, Interesting

    I've seen stuff about people using woks and TV satellite dishes to boost signal power, so there's nothing surprising about saucepans doing it too. I'd be interested to see a comparison of these improvised devices with "proper" boosters. Would I be better off saving my money and just rigging up an old wok instead?

    --
    http://ihatehate.wordpress.com
    1. Re:Pots and pans ain't nothing new... by rantingkitten · · Score: 2, Informative

      Depends on the application, I guess. Years ago, I was out of work, and so my phone got shut off, along with my DSL, leaving me with no useful way of communicating with the world. If I put a laptop on this certain part of the kitchen counter I could get a really weak wireless signal from one of the neighbors, but not enough to be useful. So I put a wok next to the antenna of the computer, and with a little adjustment in direction here and there, got a signal that way, decent enough to actually stream video most of the time.

      It was an ancient 233mhz laptop with Windows 2000, so I enabled ICS and ran a cable from it to my router, which then fed the rest of my network. I did this for two months, which was very useful for sending out resumes and such. Without the wok, it didn't work at all; with the wok, it was fairly reliable.

      So, yes, you may be better off with a wok or something similar, if your needs are modest. I did have a cantenna, built by my friend, but didn't feel like opening the laptop case to figure out how to connect the wires properly, and that would have been even more directional than the wok with no good way to prop it up to aim.

      --
      mirrorshades radio -- darkwave, industrial, futurepop, ebm.
  16. Dim-sum scoop works on modem antennas too by stimpleton · · Score: 3, Informative

    I came accross the USB Wifi site by accident a couple years back. I recalled seeing the dim-sum scoops in the local chinese mini-mart up the road, so I went up and bought one (NZ$4.50), and leaned it behind my modem's wireless antenna, then went to my garage sleepout for guests, which previously was out of range. Using NetStumbler, I watched the graph while a friend adjusted the scoop in the house. It went up to a usable "Good/Excellant" signal.

    I havent investigated why, but a wire mesh scoop seems better than a sold dish(Engineers will know I am sure).

    --

    In post Patriot Act America, the library books scan you.
  17. Re:I think I'll start keeping a frypan in my backp by deniable · · Score: 3, Insightful

    I guarantee they'll be there for hours ignoring the hi-tech and working out the significance of the frying pan.

  18. Works well for WiMax by Coert · · Score: 2, Informative

    The approach works equally well with WiMax (clear.com). I am 5 miles from a tower, but get plenty of signal using a simple Al foil reflector. Boost was about 6 dBm.

  19. This just in! by jd2112 · · Score: 3, Funny

    In response to Verizon's "Map" ads, All AT&T 3G phones now come with a skillet. A new iPhone ad states: "Frying bacon and eggs for breakfast? There's an app for that"

    --
    Any insufficiently advanced magic is indistinguishable from technology.
  20. Well that worked.... by skimitar · · Score: 5, Interesting

    ...against all expectations on my USB modem using a metal bowl I had lying around (think of a paraboloid with a flat bottom). Boosted download speeds on 3 consecutive tests by 50% (with bowl over without). Also, 3 tests in a row with no bowl showed some variation, but didn't peak at the same speed as with the bowl. Whod've thunk it.

  21. Protip by ThatsNotPudding · · Score: 5, Funny

    Spraying it down with Pam prevents the radio waves from sticking; worth at least 10 extra Mbps.

  22. Re:Are you serious? by Antidamage · · Score: 2, Insightful

    Try putting your slashdot rss feed in a pot.

  23. Old time ham radio guys by nurb432 · · Score: 2, Informative

    Already knew about this sort of stuff.. Kids these days ..

    --
    ---- Booth was a patriot ----
  24. Re:what's going on? by gyrogeerloose · · Score: 2, Insightful

    Maybe the signal strength shown on his computer includes signals reflected from the pan back into the wifi modem.

    Just to be sure, I watched the video again. The graph on his computer was measuring download speed in KB/s rather than actual signal strength. Although there's a correlation between the two, I'd tend to agree with the other posters who have postulated that the pot was more likely attenuating interfering signals rather than boosting the desired ones.

    --
    This ain't rocket surgery.
  25. Re:This is by hairyfeet · · Score: 4, Insightful

    What is sad is the trolls and flamebaits have gotten so bad here that you would think that. Sigh...once upon a time Slashdot used to be home to the greatest trolls and flamers in the world bar none. We had guys that spent ages making very intricate and truly vulgar ASCII art, trolls that would go on for three or four pages before they got to the eating poop or incestuous sex, I mean you could really tell they put a lot of heart into it, you know?

    Personally I blame digg and the chans. They have lowered the bar on trolling so badly that true artisans of the troll have left the hallowed halls for Slashdot for places where their malevolence and mischief will be appreciated, like working at Comcast, Goldman Sachs, or lobbying congress. It really is a shame, as another great art is slowly suffocated by the "dumbing down" of mass market appeal. The great trolls long past are looking down from under that great bridge in the sky and hanging their heads in shame. Truly a sad end for what was once a noble profession.

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