Review on 💎 Industrial Electrical Diamond Mounting: Replaceable Indicator with Adjustable Diameter by Richard Payne

I'm repairing an old Muzak tube amp originally made by Stromberg Carlson to use as a guitar amp. They were originally used for intercoms and background music in shops, often referred to as "elevator music". Aside from replacing the old electrolytic capacitors and 2-prong power cord with a 3-prong grounded wire, the test lamp no longer worked, so this is as close to the original as I could find. The red lens is flatter than the original, but fits the panel perfectly in diameter without altering it.