I have been flying my new X-Ray build sucessfully for a few weeks now. I really love this bird and it flies beautifully. When I was building it I was forced to use a somewhat cheap Eachine VTX because my Tramp HV's have been on backorder for months. I finally got my hands on a Tramp HV and decided to swap out the Eachine for the Tramp.
I went to fly it yesterday and noticed a lot of video noise with the Tramp. The only difference on the install was that I put the new SMA pigtail connector on a pre-drilled hole in the CF frame. I pulled the Tramp VTX from the bird and plugged it in outside the frame and the video noise was gone.
Doing a resistance test with my DMM revealed a slight short between the CF frame and the negative battery lead. I tried to do an extremely clean soldering job on my BetaFlight F3 AIO flight controller and I mounted it to the frame using nylon standoffs so I was pretty sure it wasn't a short on the FC. I also heat-shrinked the ESC's and put some double stick mounting tape under each one.
Doing further research on RCG it was mentioned that my motor screws could be shorting on the motor windings. I didn't believe this was the case because I thought I had been very careful on selecting the right screws. I decided to pull the screws anyway and with them removed the short was gone. I replaced the screws with some slightly shorter screws, no more short and the video noise is gone.
I don't know why the noise didn't show on the Eachine VTX and I only discovered this underlying issue because I swapped the VTX. So as part of any future building process I will always do a resistance test between the CF frame and the negative battery lead. I hope this helps some other new builders out there.
Jerry
I went to fly it yesterday and noticed a lot of video noise with the Tramp. The only difference on the install was that I put the new SMA pigtail connector on a pre-drilled hole in the CF frame. I pulled the Tramp VTX from the bird and plugged it in outside the frame and the video noise was gone.
Doing a resistance test with my DMM revealed a slight short between the CF frame and the negative battery lead. I tried to do an extremely clean soldering job on my BetaFlight F3 AIO flight controller and I mounted it to the frame using nylon standoffs so I was pretty sure it wasn't a short on the FC. I also heat-shrinked the ESC's and put some double stick mounting tape under each one.
Doing further research on RCG it was mentioned that my motor screws could be shorting on the motor windings. I didn't believe this was the case because I thought I had been very careful on selecting the right screws. I decided to pull the screws anyway and with them removed the short was gone. I replaced the screws with some slightly shorter screws, no more short and the video noise is gone.
I don't know why the noise didn't show on the Eachine VTX and I only discovered this underlying issue because I swapped the VTX. So as part of any future building process I will always do a resistance test between the CF frame and the negative battery lead. I hope this helps some other new builders out there.
Jerry