radio interference

Discussion in 'General Electronics Chat' started by Alan fay, Nov 25, 2015.

  1. Alan fay

    Thread Starter New Member

    Mar 30, 2015
    8
    0
    when I grab my am antenna all the static disappears. What is going on.
     
  2. Hypatia's Protege

    Distinguished Member

    Mar 1, 2015
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    Off hand I can but guess 'addition' of your body to the antenna structure enhances gain and, hence, improves the S/N ratio...

    Best regards
    HP

    PS I don't advise that 'trick' for transmission!:D:D:D
     
    Last edited: Nov 26, 2015
  3. Brownout

    Well-Known Member

    Jan 10, 2012
    2,375
    998
    In many receivers, when a signal is weak, the electronics tries to make up for it by increasing gain of the RF amplifier. By increasing the signal strength with your body as an antenna tuner, receiver gain is decreased, thus decreasing the noise and static being amplified.
     
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  4. Techno Tronix

    Member

    Jan 10, 2015
    140
    10
    Hey Brownout,
    I do agree with your judgement.
     
  5. Alan fay

    Thread Starter New Member

    Mar 30, 2015
    8
    0
    Is there some way to make this happen without me having to hold the antenna --something else to attach to the antenna?
     
  6. #12

    Expert

    Nov 30, 2010
    16,298
    6,810
    Yes. A better antenna.
     
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  7. Papabravo

    Expert

    Feb 24, 2006
    10,144
    1,791
    Move closer to the source.
     
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  8. Hypatia's Protege

    Distinguished Member

    Mar 1, 2015
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    As previous posts have advised you -- It's about increased signal strength, AGC response and improved S/N ratio attendant thereto - your next move would seem obvious!? (IOW have a gander at post #6) :):):)

    Best regards
    HP:D
     
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  9. Hypatia's Protege

    Distinguished Member

    Mar 1, 2015
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    Addendum

    @Alan fay

    If by "AM antenna" you are making reference to an AM broadcast band receiver equipped with a positionable 'loop' antenna sans provision for connection of an external antenna -- you may add same by loosely coupling a 'long wire' to the ferrite 'loop stick' (via the least number of turns required for optimal performance) -- Be warned, however, that even slight loading will reduce tank 'Q' and, hence, selectivity...

    Best regards and good luck!:)
    HP
     
    Last edited: Nov 27, 2015
  10. tcmtech

    Well-Known Member

    Nov 4, 2013
    2,036
    1,662
    It's a side effect of having either an alien or government tracking implant.

    They both use similar designs that piggyback their out going signal on any local incoming radios signals thus preventing them from being easily detected with more common RF signal detection devices.

    It's also why you have that one odd spot on your body that always hurts just a bit when you push on it too. ;)
     
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  11. ISB123

    Well-Known Member

    May 21, 2014
    1,239
    527
    Wrap it in Alu. foil.
     
  12. Hypatia's Protege

    Distinguished Member

    Mar 1, 2015
    2,791
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    Here's another thought -- If it's an 'automotive receiver' try adjusting the 'loading' trimmer --- Said adjustment is rather abrupt/critical and, ideally, set for best performance near the center of the band (~1 MHz)

    Again, good luck!
    HP
     
    Last edited: Nov 27, 2015
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