If you have a volt meter you might try checking continuity and resistance from the RCA (just one??) to the pins on the headshell fitting.
What is this?
Hi all, excuse my lack of knowledge here. I recently purchased a vintage turntable. It came with one of these. I know it fits a headshell. Other than that I have no idea what it is or how to utilize it? Any old school knowledge out there that can help identify? I don't know how to upload a photo here so I put it as my picture.