No, it wasn't. I'm wondering if there is something about the solid sate VR that isn't playing nice with the ammeter.
Right now my plan is to, in the spring:
1) Try a NOS mechanical VR that I have (date code very close to my original).
2) Try a solid state VR715 "as-is".
I would really prefer to stay with a solid state unit, so if 2) fixes the vibration then I will put those 'guts' into my existing VR and see what happens. If the needle still vibrates with 2), then I'll install my NOS unit. If the needle continues to vibrate, then I guess I will need to triple-check all my connections & grounds.