RE: 2.4 Conversion
You have to be able to turn the PCM off on the radios. What happens is if it is still on, the transmitter will send the PCM signal through the new 2.4 module just fine, but on the other end the new receiver has no clue how to decipher the PCM code. The PCM receivers could read the PCM code. If the module fits the Gold Futabas, it will work fine. The module is the radio part; everything else is about signal generation. The PCM code, just an encoded FM, is sent to the module; the module is the dumb part, just sending out radio waves. How you fed the module is what made it PCM or regular FM.