Hi guys I'm a new member to the site. I have a fly sky gtb that I have been "upgrading". I recently came across the dasmikro 6 channel expander. It basicly is a circuit that piggy backs off the ppm stream in the radio to create extra analog channels controlled by switches or pots, created by Sam sang, sold by banggood.]
My problem is I can not find any info on an install for the gt3b, only the gt3c. Unfortunately the PCB is diffent from the two models. The Instructions I found are for the gt3c. It says " You need to find where the transmitter’s encoder output goes to the RF modulator, cut the wire or pcb trace, then insert this circuit into the PPM signal stream. For the gt3b I can not locate this. Any info would be great. thanks

SHOW Dasmikro-4-Channel-Expander-DIY-Kit-For-Flysky-GT3B-GT3C-Transmitter in bangood..... It's explayed for GT3B with 2 photos...(in a PDF archive...)

http://img.banggood.com/file/product...Connection.pdf