FPV Interference Issues (Please help!)

[Alex]

Hello, I will try to keep this as sort as possible but basically no matter what I do I can seam to get rid of the FPV interference issues on my DJI F450 Quad.

Every thing is fine until the throttle gets to about half stick (about take off power) then the video feed just cuts out and doesn't return until you land the quad. You can see the interference building as the rotor speed increases until the its just static. Here is a list of things I've tried in order to fix the issue:

*Ive tried changing the channels on the video transmitter and if anything that just made it worse because on at least 2 channels the feed cut outs as soon as the quads remote transmitter is turned on.
*Ive put the video transmitter, camera and power supply in pretty much every place around the quad it will fit and makes no difference.
*Ive wrapped the video transmitter, video out cable and the ESC in tin foil to try to block the interference.
*I got cloverleaf aerials for the transmitter and receiver to try to boost the signal and no change over the stock ones!

So I am completely out of ideas on how to fix this, cos I know other people have FPV set-ups without any issues so I just don't get what wrong!

I should also probably mention that the FPV system is separate to the quad so it has its own battery and I ve tested the FPV system away from the quad and it works perfectly. I will attach some picture that I hope will help show the set up and I have listed my build below. So anyone that could give me any ideas on how to fix this would be really amazing.

Quad: DJI F450 Kit with NAZA lite ,GPS, e300 ESC and 2212 920kv motors
Quad Radio: Turnigy 9x
Video Gear: Boscam FPV 5.8G 400mW AV Receiver RC805 with Transmitter TS353
Camera: Mobius

 

[holtneil]

Hi mate you may need a ferite ring on the power , there are loads of info on Bruces channel take a look at the videos he has on his you tube channel

 

[tastelessbagel]

I am currently dealing with the EXACT same issue on my 250mm fpv racer. A power filter wouldn't help, as the problem persists even with the fpv gear powered off of a separate battery. Did you ever figure it out???

 

[holtneil]

Hi try and move the receiver and the FPV transmitter as far apart as poss , even if you have to remove it from quad just to see where the problem is coming from , if you power it up off the quad and is ok slowly move it near till you find a good place to fit it where it works ok

 

[tastelessbagel]

Hi try and move the receiver and the FPV transmitter as far apart as poss , even if you have to remove it from quad just to see where the problem is coming from , if you power it up off the quad and is ok slowly move it near till you find a good place to fit it where it works ok

Thanks, I'll give that a try.

 

[holtneil]

I cant promise it will work but you need to find what is making this happen , even if it means making up a plate to keep it far apart

 

[GJH105775]

What is with the second polarized antenna?

 

[HDtallrider]

Try moving the FPV Tx to the rear. You can mount it flat on the back of the lower plate with velcro strips/wire ties. Bend the antenna down. It may be you have the FPV antenna and the GPS antenna on the same plane and it could be causing some interference. Plus that will get the Tx away from all the nest of wires between the top and bottom plates. It seems like as the current increases so does the interference. You may even consider putting a short extension on the bottom plate and mounting the Tx farther out.