PCMsoundie Posted May 5 Report Share Posted May 5 I have a cameraman client that has a snake for camera that has major RFI on headphone out. 25-foot snake, on the pigtail the headphone out cable is thinner, about 16” long and a metal 1/8” plug. I received Strong AM radio stations on it in NYC when using a Sony FX9 camera. I unplugged the AC power supply to camera. I have had issues with Sony FS7 on it too. 2-3 camera setup with SDI cables feeding a Decimator Multiviewer quad-split. 2 cameras, monitor, and Quad splitter all on same circuit= same ground. No buzz/hum. hmm i don’t know if I tried unplugging HDSDI cables from camera. I added a ferrite core 7mm and wrapped the thin headphone out cable through twice. No effect. This is a RFI issue not a EMI issue. Has anyone used a copper shielding sleeve and heatshrinked each end on the headphone return to solve this? Other than rewiring the pigtail and using a different cable that is shielded and a new plastic molded 1/8” plug I am out of ideas. I know it is unbalanced. For a rewiring of headphone out cable should I use shielded Canare L-4E6S Star Quad ? Is this a Sony FX9 issue? Quote Link to comment Share on other sites More sharing options...
tourtelot Posted May 5 Report Share Posted May 5 Does the "sleeve" connection make it to ground back at the camera? VOM to check. My first thought is a dropped shield. Just spitballin' here. D. Quote Link to comment Share on other sites More sharing options...
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