Transistor Radio Time Machine

Step 5 Grind Radio Circuit Board

Find a place on the thumb wheel tuner dial that does not rotate do the outside area where it will come in contact with the operator's thumb when turning. Mark that spot with a pencil, then turn the dial and select two places on the circuit board to install the switches.

Using a rotary tool, grind off the solder and copper clad from circuit board at the two locations.