Interference with receiving Radio Stations

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  • Sunking
    Solar Fanatic
    • Feb 2010
    • 23301

    #31
    Originally posted by DanKegel
    In 1990 or so my speakers started making noise while the stereo was off. After listening to it for a few weeks I figured out it was a neighbor with an illegal 1kw CB radio rig talking with people in iirc Australia. I recall buying chokes.

    The tangerine tree at the house made up for the annoyance
    If it was actually CB, it was illegal. Report to FCC and they shut him down and give him an written invitation to federal court and pay fines.

    If it was a Ham Radio Operator all you would have to do is inform him, and he would fix the problem at his expense. But if your GGTI or neighbors GGTI interferes with radio reception, the FCC is not going to lift a finger to help. All the expense will be on you to fix it. Something changed in the last 8 years because the FCC would hold someone accountable which in most cases is the Installer and manufacture. Something changed because today the FCC will ignore GTI interference complaints.
    Last edited by Sunking; 03-08-2016, 11:45 AM.
    MSEE, PE

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    • bcroe
      Solar Fanatic
      • Jan 2012
      • 5209

      #32
      Originally posted by DanKegel
      In 1990 or so my speakers started making noise while the stereo was off. After listening to it for a few weeks I figured out it was a neighbor with an illegal 1kw CB radio rig talking with people in iirc Australia. I recall buying chokes.
      I wonder if someone in Australia was running 1KW, probably illegal there too. Perhaps there was so much RF voltage
      induced in your speaker leads, the transistor output was rectifying some so that you could hear the AM modulation of
      CB? If it was FM, you'd only hear a click as the carrier went on & off.

      I'd have tried twisting the speaker leads, or shielding them, then the speaker & amp if needed. Bruce Roe

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      • SunEagle
        Super Moderator
        • Oct 2012
        • 15161

        #33
        Originally posted by bcroe

        I wonder if someone in Australia was running 1KW, probably illegal there too. Perhaps there was so much RF voltage
        induced in your speaker leads, the transistor output was rectifying some so that you could hear the AM modulation of
        CB? If it was FM, you'd only hear a click as the carrier went on & off.

        I'd have tried twisting the speaker leads, or shielding them, then the speaker & amp if needed. Bruce Roe
        I would presume the ACMA (Australian communications & Media Authority) would have limitations on the power output of transmitters for both commercial and hobbyist users.

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        • Sunking
          Solar Fanatic
          • Feb 2010
          • 23301

          #34
          Originally posted by SunEagle

          I would presume the ACMA (Australian communications & Media Authority) would have limitations on the power output of transmitters for both commercial and hobbyist users.
          Every country regulates RF transmissions. In some countries like North Korea, parts of China, and Cuba will get you shot for operating radio. Although Cuba is starting to relax a bit as I make frequent contacts there on about any given day.

          MSEE, PE

          Comment

          • DanKegel
            Banned
            • Sep 2014
            • 2093

            #35
            It was definitely CB, and definitely illegal He was a foul-mouthed fellow, at least when on the air. In person he was meek.

            Anyway, chokes and maybe complaining to him were enough. I didn't really feel like calling in an airstrike.

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            • SunEagle
              Super Moderator
              • Oct 2012
              • 15161

              #36
              They do make cheap jamming equipment for CB but then you could get into trouble with the FCC.

              Comment

              • SunEagle
                Super Moderator
                • Oct 2012
                • 15161

                #37
                Originally posted by Sunking
                Every country regulates RF transmissions. In some countries like North Korea, parts of China, and Cuba will get you shot for operating radio. Although Cuba is starting to relax a bit as I make frequent contacts there on about any given day.
                I haven't looked at the FCC regs in a long time but think a transmitter over 3 watts required some type of commercial license.

                Comment

                • Sunking
                  Solar Fanatic
                  • Feb 2010
                  • 23301

                  #38
                  Originally posted by SunEagle

                  I haven't looked at the FCC regs in a long time but think a transmitter over 3 watts required some type of commercial license.
                  3.8 watts but who is counting.

                  MSEE, PE

                  Comment

                  • Logan005
                    Solar Fanatic
                    • Nov 2015
                    • 490

                    #39
                    Unlicensed or licensed by default services. Power limits.
                    3.8 watts for CB, FRS is .50 watt, Murs I think is 2 watts. there is a 900/1200 mhz band I think limited to remoteC and home child monitors. 1watt or less, 2.4 and 5.8 use spread spectrum frequency hopping tech, 1 watt or less. oh and I forgot 58 and 59mhz, less than 1/2 watt. there may be more I can't remember them all.
                    4X Suniva 250 watt, 8X t-105, OB Fx80, dc4812vrf

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                    • Sunking
                      Solar Fanatic
                      • Feb 2010
                      • 23301

                      #40
                      Originally posted by Logan005
                      Unlicensed or licensed by default services. Power limits.
                      3.8 watts for CB, FRS is .50 watt, Murs I think is 2 watts. there is a 900/1200 mhz band I think limited to remoteC and home child monitors. 1watt or less, 2.4 and 5.8 use spread spectrum frequency hopping tech, 1 watt or less. oh and I forgot 58 and 59mhz, less than 1/2 watt. there may be more I can't remember them all.
                      Depends on what band you are talking about. For unlicensed HF bands is 12 watts PEP or 3.8 watts AM. If you really want to know the info is contained in this document. Start on page 9.
                      Last edited by Sunking; 03-08-2016, 05:58 PM.
                      MSEE, PE

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                      • bcroe
                        Solar Fanatic
                        • Jan 2012
                        • 5209

                        #41
                        Originally posted by SunEagle
                        They do make cheap jamming equipment for CB but then you could get into trouble with the FCC.
                        They really don't like jammers. Bruce Roe

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                        • PNjunction
                          Solar Fanatic
                          • Jul 2012
                          • 2179

                          #42
                          Another issue is the illegal marketing of commercial lighting ballasts sold to consumers at home improvement stores:

                          http://www.arrl.org/news/arrl-again-...hting-ballasts

                          Big problem since unknowing consumers pollute the neighborhood with illegal ballasts - without knowing obviously. Of course the big-box stores are the real polluters by selling illegal products to consumers in this instance.

                          Last edited by PNjunction; 03-09-2016, 01:23 AM.

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