I use 3 modules with my JR tx's ( 347 + 388 ) . One marked PCM and FM , model # NET-J72P . One only marked FM , model # NET-J72M . One only marked AM , model # NET-J72M . Now I've used the PCM J72P for both FM Hitec rx's (pos shift) and JR PCM rx's with no problem . The J72M AM module works fine with JR , Futba and Hitec AM rx's ( selected as PPM in tx setup ) . My question is about the J72M NOT marked PCM , I've only used it on a FM (PPM) JR rx . Can this module also run a PCM rx or is part or all of the PCM system intergrated into the module ? Thanks Wayne . RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]