Bulb Test Fixture
If you want to build the fixture with the line isolation transformer, which I reccomend, then also use the above pictorial but make the following changes. The two wires from the switch box going towards the bulb box, would instead hook to the input of your transformer. The two wires out from your transformer would connect to the two wires going to the outlet box. An AC/DC radio such as the S-38, wired as it came from the factory, presents an serious shock hazard if you touch the metal chassis and any other grounded object or even stand on a cement floor while touching the chassis. If you make the mods I suggest elsewhere on this site, by adding a polarized plug and rewiring the switch, then this shock hazard problem goes away. But still treat that chassis with respect. A capacitor could fail and give you the same shock hazard.
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