I have a P3S and and did the DBS mod. I also replaced the stock P3S birdside antennas and the landing gear with a set from a P3P as was mentioned earlier in this thread. Instead of just running the antenna wires straight to the camera, I opened the AC and and removed the stock antenna wires from the board, then plugged the new antenna wires in. All connections were double-checked and hot glue was used to secure them. I'm not getting the range I'd hoped for. According to DJI Go, I flew out about 4,200 feet at a altitude of just under 400 feet and then RTH kicked in. This happened a couple of times. I'm in a bit of a low spot compared to the surrounding area, but the altitude difference is minimal. There are hardwood trees around me, but I'm in a relatively open area with the RC. Just prior to the RTH engaging, my video was getting weak.
My question is, did I do something wrong by connecting the P3P antennas directly to the board inside the AC? I'm sure my results should be much better than they are. Any help is appreciated.