H3-2D Gimbal videoTX installation

Struts

Member
I'm working to install a small 1.3 Ghz transmitter. Getting great video signal, but then the gimbal tilt control stops working, and the motors won't turn. As soon as I unplug the TX, everything goes back to normal. What's going on here? It's not power, there's something else going on here.

I am using power from main battery terminal. Some sort of grounding issue?

After several hours of wiring and rewiring, I am out of ideas ...
 

Top