We have a few Alt 360 radials we're trying to clean up and keep in stock. When you turn them on, however, you see an image of the lamp projected on the wall. I thought this was caused by the wrong type of lamp what with the precise position needed inside the reflector. When we installed a suitable lamp (EGE based on an old Alt data sheet) the problem didn't go away.
Any ideas on the cause of this and any solutions to fixing it? Is it a reflector problem instead?