Frequency FAQ

• Information on changing bands from 72 to 75, and others.
  
  
• How do I change the frequency of my transmitter?
  
  
• How do I change the frequency on my receiver?
  
  
• What frequency is channel xx?
  
  
• I have a European FC28 radio I am bringing to the U.S. What module can I use to legally and safely operate on U.S. frequencies?
  
  
• Can I use a ground radio like the 3PJS on 50MHz (Ham band, 6 meters)? I am a licensed HAM user.
  
  
• Who can use a radio system on 50 or 53MHz in the U.S.? If an authorized user is flying on 50MHz, can a non-licensed operator fly on a buddy cord or with the supervision of the licensed operator?
  
  
• Why are there different modules for the 9Z and the 8U? Can I use my 9Z module in my 8?
  
  
• I have an older R127DF receiver that is not marked Hi or Low band, how can I tell which one I have?
  
  
• Please explain Hi and Low band to me? I am not sure what the difference is between them.
  
  
• Can I purchase a flight pack in the PCM mode?
  
  
• Please explain narrow band to me. How do I know if my transmitter is legal to use? Can I get it upgraded if it is not? Is my receiver safe to use?
  
  
• What does it mean to have my TX and RX 'matched'?
  
  
• How do I change the frequency of my transmitter?
  
  
• How do I change the frequency on my receiver?
  
  
• Information on changing bands from 72 to 75, and others.
  
  
• Can you convert my AM receiver to FM?
  
  
• I need to replace a crystal. How can I buy one?
  
  
• I have an R129DP receiver. I understand there is an upgrade that can be made to these. What is it and how do I know if mine needs it?
  
  
• What servos should I use with HRS and Normal Response mode?
  
  

Please refer to our radio frequency chart.

The Futaba module which begins TK, which is produced for the 9Z radios, is safe and legal for use in the U.S. in your FC28 radio. (FUTL17**)

Yes. None of the ground radios are specifically distributed on ground frequencies; however, if you are using a modular radio such as the 3PJS which uses the TJ module, you can exchange the module with the TP or TK module (designed for the 8U and 9Z aircraft radios) on 50MHz. You will also have to purchase an R127DF or similar receiver on 50MHz. At this time no 3-channel car receivers are available on 50MHz.

Per the FCC regulations:

Operation in the 50 and 53 MHZ bands within the U.S. require holding an amateur operator's license. Only these amateur license holders are permitted to use radio links to control "model craft", such as model airplanes and boats. Certain restrictions apply [97.215] on this kind of operation:

• Station identification is not required for transmission directed only to the model craft. The control transmitter must bear a label indicating the station's call sign and the licensee's name and address [97.215(a)].
• Control signals are not considered codes and ciphers [97.215(b)].
• Transmitter power cannot exceed 1 W [97.215(c)].
• Only licensed amateurs may operate telecommand transmitters using amateur frequencies.

While unlicensed persons may participate as "third parties" in most amateur operations, they may not participate in telecommand operation (R/C flight). This is true even when a licensed amateur is closely supervising the operation. The FCC says that the one-way transmissions involved in telecommand does not constitute third-party messages exchanged between control operators. Non-amateurs must use equipment and frequencies in the Radio Control Service bands. If licensed amateurs wish to use amateur equipment and frequencies for model telecommand, it is their responsibility to be sure that they can safely operate the equipment while observing the FCC's Rules.

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