Most breadboards have a long trough running across the middle, separating the board into two equal halves.The printed logo, letters and numbers on the device are the right way up when viewed this way. Hold the op-amp so that the divot or dot is on your left. If there is no divot, there should be a small circular depression or dot on one corner. Notice that the op-amp has a small semi-circular divot on one edge, which is used to orient it properly. Wire strippers (or a similar item, like sharp scissors or a knife).Toilet paper tube, or small, non-conductive cylinder, 1.75–2 inches (44–51 mm) in diameter (glass bottle, cardboard/plastic tube, etc.).Operational amplifier, type 741 or equivalent (also called an op-amp X Research source x1).50–100 ft (15–30 m) insulated wire (any color for the antenna).22uF electrolytic capacitor, (10v or higher) (x1).200pF variable tuning capacitor (160pF will do.
45–60 feet (14–18 m) of 26 AWG (0.4 mm) enamelled wire (for the inductor).15–20 inches (38–51 cm) of black insulated wire.15–20 inches (38–51 cm) of red insulated wire.These can be bought at most hardware stores, home centers, and electronics stores. You likely already have many of the parts you’ll need for this project, excluding some of the electrical components.