If you’ve used any of the popular VTXs at the moment, you’ve probably come across this uFL connector. It is utter turd for drones. When I had a TBS Unify, it ripped the connector from the PCB, leaving that transmitter useless. On my Matek VTX (yeah I accidentally bought the uFL version – idiot) I couldn’t get the pigtail to stay in due to how rigid the wire was.
Soldering the pigtail is the best solution in this situation, and while that might be almost impossible on the Unity transmitters, Matek have made it rather straight forward – and even illustrate that on their website! Thanks Matek.
The first step I would recommend is covering the connector on the PCB before soldering anything. This will prevent any bits of solder shorting the circuit, which would be a pain in the butt to fix later on.
Above the connector are three pads. GND ANT GND. The illustration above makes it pretty clear; you need to cut the end off of your pig tail, twist the outer mesh into two strands and solder them to the GND pads.
The inner ‘core’ should then be soldered to the middle pad. That’s it!
You may also want to use some putty or cable ties to secure the pigtail to the board in case it gets pulled in a crash.