No bulb on this style. There is a slightly newer one that does have a backlit display though. Those are an LCD with black digits and a green lamp behind it. Thats the 6 memory radio with the knobs.
**edit** this one
These are what is called a VFD, a vacuum flourescent display. It actually runs on 40 volts or so for the plates and about 2 volts for the filament. Its a vacuum tube, or related to a CRT.
anyway, what happens is the flyback transformer that creates the high voltage inside dies. Its on a board down inside somewhere. In theory its an easy fix, you replace the transformer on the board. The problem is they don't seem to exist anymore so I have no idea where you get one. I've got one that became a parts radio for exactly the same reason. Pulled the transformer out and it ohm checked open.
**edit** this one
These are what is called a VFD, a vacuum flourescent display. It actually runs on 40 volts or so for the plates and about 2 volts for the filament. Its a vacuum tube, or related to a CRT.
anyway, what happens is the flyback transformer that creates the high voltage inside dies. Its on a board down inside somewhere. In theory its an easy fix, you replace the transformer on the board. The problem is they don't seem to exist anymore so I have no idea where you get one. I've got one that became a parts radio for exactly the same reason. Pulled the transformer out and it ohm checked open.
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