Here is the Circuit board with Radio Shack High Brightness White LEDs, PN 276-0024. Each LED has a 1/2 Watt, 220 ohm resistor (power computes to about 1/4 Watt) in series with the LED. The resistor can be on either LED lead. The current in each LED measured 39mA. I used epoxy under each LED to condu...
The first step in using LEDs is figuring out the polarity. Facing the front of the circuit board, the positive voltage hole is on the right, for all three bulbs. Positive marked "+" in the photo.
Radio Lamp Polarity crop.jpg (34.42 KiB) Viewed 8590 times
Another tip on disassembly - In removing display, after straightening metal tabs, pull display STRAIGHT out from circuit board. There are two plastic alignment posts on the display that you do not want to break! In my photo the post on the left is partially broken. When reassembling, make sure signa...
My Radio lights completely went out, and I wanted to try LEDs instead of bulbs.
Here is the end result using Radio Shack High Brightness White LEDs #276-0024
Radio LEDs evening crop.jpg (80.1 KiB) Viewed 8593 times