Parts List of the Most Simplest Transmitter

Transistor:
1    2SC2003 or the alternatives. BC337 can be used but the pins arrangement has to be changed. See the FAQ.

Registors:
1    10K Ohm 1/4 -1/8 Watt (brown-black-orange)
1    27K 1/4 -1/8 Watt (red-violet-orange)
1    470 - 500 1/4 Watt (yellow-violet-brown)

Capacitors:
1    10PF  Ceramic
2    0.01MF (also indicated as 103)  Ceramic
1    1 - 10 MF  Electrolyiic

Coil:
1    7 turns by 0.5 mm enamel wire, 2.5mm diameter

Trimmer capacitor:
1    10 - 20 PF
(there are various shapes but keep the value-10_20PF)

Copper-clad circuit board:
1 plate of 4 x 5 cm (minimum) and 0.5-1.0 mm(thick) and 4(5) small squares (5 x 5 mm)

Audio cable:
30 - 50 cm lengh of audio cable with mini-mono (or stereo) 2.5mm plug. When you use mini-stereo cable, you must use the left channel (white) only.

9 volts Battery and the snap connector