Flip over the device

Remove the batteries.

Using a Philips #00 screwdriver, remove the screws and set them aside.

Pull of the back of the radio.

Remove the battery springs from the casing by pulling them up.

Example of what a battery spring looks like when already removed

Unscrew the main board

Lift up the main board and use your other hand to pull the antenna from its socket

Main Board

Antenna

Antenna Socket

Pull the red plastic strip from the casing using your free hand.

Remove the board glued to the speaker using your opening tool.