I'm really glad it worked out, Rick. Please refresh my memory - Wasn't this coil for a McIntosh amp or something?Glad you are able to archive your records - That will help them last longer. You can listen on CD most times and play the record album every now and then. I always used to do this on tape, now a guy can do it on CD so that's cool.
Great idea on the battery for your car stereo. That way it keeps its settings even after it is removed. The diode and battery was a really good idea.