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Is it true or urban legend

Discussion in 'FCC Activity' started by Rescue, Dec 17, 2017.

  1. TM86

    TM86 Destroyer of radios

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    Parked under a bridge one time. Meters would jump in either direction along the riverbed, and drop directly over our position. Upset a few people with that one.


     

  2. jdobbs2001

    jdobbs2001 Active Member

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    There are capabilities to triangulate your position in seconds but those assets and capabilities belong to other agencies.

    The FCC has more important battles to fight and 11 meters is way down in the food chain.
     
    jessejamesdallas likes this.
  3. jdobbs2001

    jdobbs2001 Active Member

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    I remember when I was a teen building a modified pair of CB’s that would burst transmit your voice and cause the reciving station to switch to a random channel awaiting the next burst transmit.

    The way it worked is both radios had been modified to work with a tape recorder that would record a preamble which would indicate a random channel picked by a commodore 64 then when you spoke it would be recorded on a tape loop. Once you finished, the system would play the preamble and voice at a very high speed, it sounded like a squirt. I would use the time of day to create a new seed value for the PRNG routine running in basic.

    So as both users would converse all you would hear is a quick burst on a channel and nothing else for a while. You would have to move channels all the time to try and attempt to follow the convo.

    On every transmit the channel on transmit and recieve radio would change to the new channel. It could go like. Channel 18 then 5 then 22 then 39 etc.. it worked great also as a countermeasure against the dipshit in the neighborhood who wanted to keydown and jam our comms. Lots of fun back then.
     
    #18 jdobbs2001, Mar 16, 2018
    Last edited: Mar 16, 2018
  4. Road Squawker

    Road Squawker Sr. Member

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    FCC field agents are equipped with direction finding gear, and they do know how to use it.
    "Angle of arrival" (triangulation) is just one of many methods used to determine a transmitters location.
     
  5. Mudfoot

    Mudfoot Sr. Member

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    FCC has direct access to those listenng locations and will use it.
     
    Captain Kilowatt likes this.
  6. TM86

    TM86 Destroyer of radios

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    And today you could do it all in software with a Raspberry Pi.

    Not taking away from what you did, because it's very cool. Just thinking of what it would look like today.
     

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