PCMsoundie Posted May 5, 2022 Report Share Posted May 5, 2022 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, 2022 Report Share Posted May 5, 2022 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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