Your couch IS spying on you!

Posted on August 13, 2013 by Fred Stiening

As A child, I marveled at how I could hear an AM radio on a crystal radio set that used no power

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10 Responses to Your couch IS spying on you!

  1. Nidster says:
    August 14, 2013 at 12:23 am

    We have an aluminum window screen that picks up the signal from a nearby transmitter. It used to play Country music, think Dolly Parton & Merle Haggard.

  2. Art Stone says:
    August 14, 2013 at 1:19 am

    I’m undecided if this video is a viral prank. If it has enough energy to flash an LED, the device wouldn’t need to passively deflect an active signal when it wants to “talk”

  3. Art Stone says:
    August 14, 2013 at 5:49 am

    My dad was a ham radio operator – our home was built in the 1920s. When he would talk, the light on the 2nd floor would flicker – it was on double pull, double throw switches so you could turn on/off the light from the bottom or top of the stairs. Needless to say TV reception was out of the question.

  4. briand75 says:
    August 14, 2013 at 7:01 am

    Somewhat hocus-pocus is the best one can say. Sure, there is ambient EMF, but it would only be sufficient for such uses in high density areas such as cities with lots of RF transmitters. If you are out in the plains in Montana, your ambient RF/EMF is close to absolute zero.

    Art – lights not only flicker with HAM radio, you can usually light flourescent bulbs with any decent final amp on the transmitter. The difficulty is that, like light energy (photon energy), it falls off geometrically (a factor of the distance squared). Not much use across the road.

    • Art Stone says:
      August 14, 2013 at 9:27 am

      Okay, so you’re either saying my memory is faulty or I’m making it up.

      He was on 160 meters. Does that help? How about the clues of the wiring being from the 1920s and not having a ground wire?

      • briand75 says:
        August 15, 2013 at 6:47 am

        No – your memory is correct, Art! The RF is generated by the amplifier in the transmitter and pumped on the cable to the antenna where it radiates (pretty much unidirectional). This RF is HF (high frequency) and is what lights flourescent bulbs and makes the TV into white noise speckles. My family used to stand at the door to my radio room and threaten my life if I was on 80 meters during the evening news.

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