ORIGINAL: BigSkyRCer
I am not the only one, who has done this out of "Lack of knowing" not trying to break the law. Period. I think Futaba/JR, etc, etc, should list this warning on each TX crystal they sell, most people do not know this, as we all do not work on radios and deal with the FCC.
It is clearly stated in the Futaba manuals that transmitter crystals can only be changed by an authorized service center. It's also been discussed here many times and almost every time, one or more people make it obvious that they knew what they were supposed to do, but changed the crystal on their own anyway. I do agree that there should be clear instructions provided with the transmitter crystals.
Edit: forgot to mention, it's also been mentioned several times that hobby shop owners, who DID know better STILL advised customers to change them on their own.