u/Hydra696

Getting “RF signal low” at short range and really bad video range, no idea what’s going on

I can still fly the quad, but I get random “RF signal low” warnings, sometimes already after a short distance. It’s not constant, just pops up randomly.

The bigger issue is the video. After around 15 to 20 meters the image is basically gone and just turns into noise. If I point my patch antenna directly at it I maybe get 40 to 50 meters.

I already swapped the VTX for the exact same model and nothing changed.

All antenna connections are properly attached. I’m using RHCP antennas on both goggles and VTX.

I can also 100% assure that all solder connections are good.

Receiver and antenna are both 868 MHz, so that matches. The RX antenna is new and connected via U.FL.

On my F4 the RX antenna cable runs between FC and ESC, so basically right through the stack. I think that could be causing some interferance right?

At this point I don’t know if both problems are related or two separate issues.

Any ideas?

This part broke after my KO MP36 Megatron fell off the shelf. I tried gluing it back together, but it wouldn’t hold. Then I tried to remove the whole part so I could make a 3D-printed replacement, but the pin just wouldn’t budge. If glue doesn’t work, I’ll probably have to cut the part apart to get the pin out.