Greetings! I am bringing back to life a wonderful receiver that has served me well for many years. In another post (my first ever) I have asked for help with another problem, but in this thread I would like to learn from you how to replace burned out light bulbs that illuminate the dial. There are three bulbs that are soldered to wiring, and secured in a soft rubber socket that holds the assembly in a plexiglass housing. Do any of you have an idea what kind of bulb I can use as a replacement? Thanks!