Replacing the video head disc in a Sony SL-HF360 super Beta hi-fi circa 1987 with a (NEW from old stock) substitute 3 head disc. the original 2 head part DSR-84-A has long been out of production and next to impossible to find. however with some light improvising I found the 3 head DSR-27-A is a suitable replacement option as the pg magnets are the same. all that is required is to remove the A' wires as they will not be necessary as A' head will go unused. THIS VIDEO IS FOR DEMONSTRATION AND INFORMATION PURPOSES ONLY. DO NOT TRY THIS IF YOU ARE INEXPERIENCED IN THIS SKILL. THE VIDEO MAKER IS NOT RESPONSIBLE FOR DAMAGE TO YOUR EQUIPMENT OR BODILY INJURY DUE TO ATTEMPTING TO TRY THE PROCEDURE IN THIS VIDEO.