Thanks for the info. Turns out I got it working with a little sand paper and WD-40. I appreciate your info. I kind of assumed it was something more technical just because of the age of the amp. Thought it might of broke over time. I'm glade it was simple like that though. This being an older style bulb though, is it even possible to find these anymore? I know it will go someday, it won't hold up like an LED would.