ORIGINAL: skiman762
(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.
Does this mean JR tx are in violation of federal law since the crystal is right there on the back accessible to the user?
where are Futaba crystals located ?
The transmitters are FCC acceptance certified which means the FCC has forgiven or accepted these deviations from the rules.
BTW, I happen to have the correct license and equipment to work on these radios but I don't have access to the schematics or tuning procedures which the manufacturers guard closely. Back in the 70's I got a copy of schematics for a radio I had and was able to work on it but that was the last one.