stevem Messages: 4733 Registered: June 2004 Location: NY
Senior Member
The bulbs are replaceable, they are GE 335 bulbs.
The best way to replace them without doing damage to the 40 year old switch is to first remove the amp from the cabinet.
Then remove the metal lid from the amps top.
After that use a big flat blade screwdriver to push out the switch lens cover towards the face of the amp.
Next get some automotive vacuum hose that fits a new bulb tight and then use that as a extension handle to extract the bad old bulb and install a new one .
A wipe of grease or Vaseline on the new bulbs treads will stop it from rusting in the socket as they sometimes do.
Then support the rear of the switch when you push the blue lens cover back on.