1. You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
    Dismiss Notice
Dismiss Notice
This forum does not allow a single user to have more than one username. If anyone wants to change their username contact an admin and it will be done. Multiple accounts belonging to the same member will be deleted without warning.

Is it true or urban legend

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

  1. TM86

    TM86 Sr. Member

    Joined:
    Jul 6, 2014
    Messages:
    712
    Likes Received:
    960
    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

    Joined:
    Mar 20, 2012
    Messages:
    149
    Likes Received:
    54
    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

    Joined:
    Mar 20, 2012
    Messages:
    149
    Likes Received:
    54
    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

    Joined:
    Jan 19, 2011
    Messages:
    1,954
    Likes Received:
    1,492
    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 Elmer

    Joined:
    Jun 17, 2009
    Messages:
    10,870
    Likes Received:
    6,135
    FCC has direct access to those listenng locations and will use it.
     
    Captain Kilowatt likes this.
  6. TM86

    TM86 Sr. Member

    Joined:
    Jul 6, 2014
    Messages:
    712
    Likes Received:
    960
    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.
     
    Slowmover likes this.
  7. 43315

    43315 Member

    Joined:
    Jan 11, 2009
    Messages:
    17
    Likes Received:
    22
    Have a dopler system. Antenna on the four corners of the roof.
    It measures the difference between each one and has a circle of less showing me what direction the single is coming from. Can be on a doorstep on no time. We did a lot of fox hunts few years ago. Might have to break it out again.
    Funny telling someone jaming a repeater what the color of there house and make of car in the drive.
    LoL
     
  8. Rwb

    Rwb Sr. Member

    Joined:
    Jun 30, 2018
    Messages:
    2,782
    Likes Received:
    3,409
    you do realize this is an old post?
     
  9. 43315

    43315 Member

    Joined:
    Jan 11, 2009
    Messages:
    17
    Likes Received:
    22
    And your point?
    I wanted to add something to it, if that upsets you sorry get over it
     
    338_MtRushmore and DoctorAudio like this.
  10. Robb

    Robb Yup

    Joined:
    Dec 18, 2008
    Messages:
    11,416
    Likes Received:
    3,477
    If you think you are safe using a 400w amp and think the FCC has better things to do; them reconsider. The first time you interfere with a fire station, or the police dept., or ambulance services, US naval vessels (been there; done that)/military communications, or - dare I say it - air traffic controllers and aircraft, they will hunt yer azz with a new found zeal.

    The really neat thing? You won't know that you were interfering until you get a notice in the mail, or a knock on the door.
    Roll the dice, deal the cards, and spin the wheel; you take your chances.
     
    S&W357 and Shadetree Mechanic like this.
  11. Shadetree Mechanic

    Shadetree Mechanic 808 On The North Side of Dover

    Joined:
    Oct 23, 2017
    Messages:
    4,349
    Likes Received:
    6,612
    There are some frequencies that you want to stay away from too. I got this from Bells CB website.

    Frequencies To Stay Away From

    Frequency - User
    25.670-26.100 - Broadcast remotes
    26.617 - Civil Air Patrol (CAP)
    27.430, 27.450, 27.490, 27.510, 27.530 - Business
    27.870, 27.920, 27.974 - US Navy-MARS
    28.000 -29.700 - 10 Meter Ham Band





    27.410 EXPERIMENTAL
    27.415
    27.420 USGOV
    27.425
    27.430 BUSINESS
    27.435
    27.440 EXPERIMENTAL
    27.445
    27.450 BUSINESS
    27.455
    27.460
    27.465
    27.470 BUSINESS
    27.475
    27.480
    27.485
    27.490 BIS (ITINERANT)
    27.495
    27.500
    27.505
    27.510 BIS (LOW POWER)
    27.515
    27.520 USGOV
    27.525
    27.530 BIS (LOW POWER)
    27.535
    27.540 USGOV
    27.545 USGOV
    27.550 USGOV
    27.555 USGOV
    27.560
    27.565 USGOV
    27.570 USGOV
    27.575 USGOV (ITINERANT)
    27.580
    27.585 USGOV (ITINERANT)
    27.590 USGOV
    27.595 USGOV
    27.600 USGOV
    27.605 USGOV
    27.610 USGOV
    27.615 USGOV
    27.620 MARS
    27.625 USGOV
    27.630 USGOV
    27.635 USGOV
    27.640
    27.645 USGOV
    27.650 USGOV
    27.655 USGOV
    27.660
    27.665 USGOV
    27.670
    27.675 USGOV
    27.680 68 AU MARITIME
    27.685
    27.690
    27.695 USGOV
    27.700 USGOV
    27.705 USGOV
    27.710
    27.715 USGOV
    27.720 72 AU MARITIME/USGOV
    27.725 USGOV
    27.730
    27.735 MARS
    27.740 USGOV
    27.745 EXPERIMENTAL
    27.750 USGOV
    27.755
    27.760
    27.765
    27.770
    27.775 USGOV
    27.780 USGOV
    27.785 USGOV
    27.790 USGOV
    27.795
    27.800 USGOV
    27.805
    27.810 USGOV
     
    Crawdad and Slowmover like this.
  12. 144inBama

    144inBama Electricity doesn't kill you, ignorance does.

    Joined:
    Apr 22, 2020
    Messages:
    478
    Likes Received:
    794
    While in the Air Force (25+ years ago), worked with a guy (was on the same base) who pieced together/built a unit from a AN/PRC-77
    that could transmit and receive on most all bands including miltac freqs. He got in all kinds of trouble, almost a dishonorable/ less than honorable discharge...and it wasn't the USAF that went after him, it was the wonderful FCC. The USAF only got involved when they found out he had used some spare parts form a Roland missile battery to build it.
     
  13. secret squirrel

    secret squirrel Lustrous Potentate

    Joined:
    Oct 5, 2008
    Messages:
    406
    Likes Received:
    813
    My favorite urban legend related to channel monitoring is that I have had retired military tell me that everything said on a landline telephone is monitored by a computer at Fort Hood, TX. It has been so since the 1960s. The computer watches for key words and phrases that are related to national security. I have watched CAP downed plane drills where they triangulate the downed plan location. The Truth is Out There. Trust No One. In God we trust, All others we track.
     
  14. 144inBama

    144inBama Electricity doesn't kill you, ignorance does.

    Joined:
    Apr 22, 2020
    Messages:
    478
    Likes Received:
    794
    Lookup "Stingray cell tower".....
     
  15. Shadetree Mechanic

    Shadetree Mechanic 808 On The North Side of Dover

    Joined:
    Oct 23, 2017
    Messages:
    4,349
    Likes Received:
    6,612
     
    144inBama and Slowmover like this.

Share This Page

  • About Us

    The WorldwideDX Radio Forum was originally established in 2001. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. We are working every day to make sure our community is the best Radio Hobbyist's site.
  • Like us on Facebook

  • Premium VIP Member

    The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. Care to buy us a beer? We'd really appreciate it!

    Donate to us!