Zoltan Perhacs wrote: >The hard part for me is the RF stage. Can someone help me in this (40MHz). Try buying a complete RF stage as a spare part. I had no problem buying one when I thought my Hitec transmitter was broken. Also, stay away from airplane frequencies unless you really know what you're doing: a 2 kg plane doing 100 km/h can do _a lot_ of damage if jammed out of control! Cheers, Goeran Stigler