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Smallest FM Micro Receiver

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  • Smallest FM Micro Receiver

    Hello

    I was wondering IF anyone knows of a Smallest possible size FM receiver that can be used for under water runs. A 2ch. is what I am after. It has to be MICRO SIZE, FM 75Mhz would be on the list also.

    Any links, pictures, details. That would be Great.
    Thanks
    George

  • #2
    Are these too big ?
    the black box is a futaba 2 ch Am receiver.

    A1/400 Franch Le Redoutable for size.
    Attached Files
    Last edited by cheapsub; 06-29-2020, 02:05 AM.

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    • #3
      Thanks for the reply. Can`t tell from the pictures. Would it be possible to give me measurements of each? Make it easy by giving each one a letter and it`s size. Just to confirm, they are FM and Futaba 75mHz FM compatible?
      Thanks
      George

      Comment


      • #4
        George...don't you see the penny? Diameter-.750" or 19.05mm ...I am sure he placed them in the pictures for size comparison also you probably know this but click on the pictures twice to enlarge them or pull them to your desktop and enlarge them with your picture viewer- BG
        Last edited by Bob Gato; 06-29-2020, 09:29 PM.

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        • #5
          Originally posted by Bob Gato View Post
          George...don't you see the penny? Diameter-.750" or 19.05mm ...I am sure he placed them in the pictures for size comparison also you probably know this but click on the pictures twice to enlarge them or pull them to your desktop and enlarge them with your picture viewer- BG
          Hi B.G

          Thanks BUT I really can`t get a Good look at them blown up, fuzzy unclear pictures. Looks like 72Mhz NOT sure and can`t tell anything else about each. That is a U.S penny?
          Need to ask the obvious, you are not supposed to run 72Mhz with 75mhz people because of affecting fly guys and ticking off 75Mhz guys at runs, Yes???????

          Comment


          • #6
            Try to post the info, but the system said it's a spam?
            1/400 sub model is small!
            never mind the 72mhz it will works with 75 mhz crystal that how I tested, is the frequency crystal only about 10 " frequency " you can pick from.
            GWS pico
            High with crystal 14.30 mm X 34 mm X 16.25 mm.
            antenna 22 inch/480mm long.

            Multiplex pico 3/4, modified by me with the GWS crystal and pins sideways.

            14.60 mm X 47mm X 16 mm.
            antenna 28.5 inches/ 730 mm.

            Stock pins up, with crystal and servo connector install.
            22 mm X 40.52 mm X 17.35 mm
            Attached Files
            Last edited by cheapsub; 06-30-2020, 12:13 AM.

            Comment


            • #7
              If you need it to be FCC happy. Sorry no such receiver now.
              All be discontinued about 10 years.

              Fly boys all move to 2.4GHz by now. 72 MHz is very dangerous, as soon as some one turn on the same frequency you plane is good as dead.

              I tried with 4 transmitter on the same frequency, receiver ask who the daddy.

              As long as you transmitting in 75 MHz, you are OK with the fly boys.
              receivereis just like a AM/FM radio you pick up at a Walmart.
              Attached Files
              Last edited by cheapsub; 06-30-2020, 12:37 AM.

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              • #8
                messaged you privately
                George

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                • #9
                  Originally posted by george View Post

                  Hi B.G

                  Need to ask the obvious, you are not supposed to run 72Mhz with 75mhz people because of affecting fly guys and ticking off 75Mhz guys at runs, Yes???????
                  George -Not the case-72 and 75 shouldn't interfere with one another- the 72s will interfere with the airborne 72s on the same channel and the 75s will interfere with the surface and submerged 75s on the same channel...that's why we use a frequency flag or peg board. Also its a very easy mod to change an old radio (have a licensed tech do it) from 72 to 75 mhz.

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                  • #10
                    Got it Thanks Bob

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