RE: Are Futaba and Hitec dual conversion rx crystals interchangeable?
yes you can, So long as the hitec receiver is set up for futaba then you can use a futabe crystal or a hitec crstal made for Futaba. There are no differences other then the system they are designed for. I fly a P-40 at Top Gun with a Futaba 129pcm and a Hitec crystal in the receiver. Never a glitch.