How do you increase transmitter range?

Discussion in 'General Electronics Chat' started by Robin Mitchell, Dec 22, 2010.

  1. Robin Mitchell

    Thread Starter Well-Known Member

    Oct 25, 2009
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    HI everyone,

    How do you increase the range of a transmitter? (radio)

    Thanks :)
     
  2. shteii01

    AAC Fanatic!

    Feb 19, 2010
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    To quote Tim the Tool Man Taylor: More Power!
     
  3. Robin Mitchell

    Thread Starter Well-Known Member

    Oct 25, 2009
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    seriously :p
    So i would use a transistor to amplify the signal going into the transmitter?
     
  4. tracecom

    AAC Fanatic!

    Apr 16, 2010
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    In most cases, you use transistors (and/or tubes) to amplify the RF signal from the transmitter. Sometimes, the least expensive way to increase range is to use a bigger antenna, a higher antenna, a more efficient antenna, or a directional antenna.

    What frequency are you transmitting? What is your present power output? What antenna are you using? If you're already running the legal limit for the frequency you're using, then improving your antenna is your only option (and even that may not be legal.) On the other hand, if you're currently running well under the legal limit, an additional amplifier may be the answer.
     
  5. marshallf3

    Well-Known Member

    Jul 26, 2010
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    Exactly, what frequency are you dealing with? It's easy enough to look up the legal ERP.
     
  6. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    The range can also be increased by using a directional antenna.
    That will point the power in one direction.
    Also a dirctional antenna at the reciever side may help.
    What frequency range are you using?
    Check how much power you may use in that range at the local authorities .

    Take a look at this page for antenna ideas:
    http://ac6v.com/antprojects.htm

    Bertus
     
  7. Kermit2

    AAC Fanatic!

    Feb 5, 2010
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    The other way that won't make the FCC freak out, is to increase the receiver sensitivity. Bigger RCV antenna or a higher gain RF amp section, or both.
     
  8. Papabravo

    Expert

    Feb 24, 2006
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    Select the right band. RF propagation can be around the world on the right band. Check ou the Space Weather site for MUF (Maximum Useable Frequency)

    http://www.spacew.com/www/realtime.php
     
  9. solis365

    Member

    Nov 5, 2008
    21
    0
    if you're trying to boost the range of those car FM radio transmitter thingys, look up the "itrip." terms like itrip hack, itrip mod, etc

    all they do is make the antenna bigger.
    ive been looking into doing this and thats the easiest solution. the other way is to get a stronger FM transmitter IC or build your own, which is significantly more complicated.
     
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