Changing the crystal on your transmitter is illegal unless you have the proper license. The FCC has established guidelines for the modeler's safety and for the safety of spectators. For safety and FCC reasons we must request that both TX and RX be sent to a service center to ensure proper crystal change and retuning to the new frequency. Crystal based radios cannot be converted to another band without parts replacement, and may not be able to be converted at all. Certain radios can be converted, for example, from 72 to 75MHz. Please contact the service center for any other conversions.
The applicable Federal Regulation is as follows:
TITLE 47—TELECOMMUNICATION COMMISSION (CONTINUED) PART 95—PERSONAL RADIO SERVICES
Subpart E—Technical Regulations Sec. 95.645 Control accessibility. (a) No control, switch or other type of adjustment which, when manipulated, can result in a violation of the rules shall be accessible from the transmitter operating panel or from exterior of the transmitter enclosure. (b) An R/C transmitter which incorporates plug-in frequency determining modules which are changed by the user must be certificated with the modules. Each module must contain all of the frequency determining circuitry including the oscillator. Plug-in crystals are not considered modules and must not be accessible to the user.
-------------------------------------------------------------------------------- What does it mean to have my TX and RX 'matched'? When you have your transmitter and receiver 'matched' both are carefully tuned to the best possible signal input and output. This helps ensure that you receive full safe transmitting range with your equipment because the RX is receiving and the TX is broadcasting the cleanest possible signal. It is a good idea to have your TX retuned occasionally. And for safety, you should always have an RX retuned after a crystal/frequency change.
Graves R/C
4814 N. Orange Blossom Trail, Orlando, Fl 32810
