Two Transistor Amplifier

Funway Electronics Project 15

As distinct from our previous audio amplifier, this two transistor amplifier will drive a speaker. It can be used on its own, or in conjunction with the one transistor amplifier (Project 13) for even increased performance.

You will need these components
One 1.2k ohms (brown – red – red)
One 100k ohms (brown – black – yellow)
One 470k ohms (yellow – violet – yellow)
One 500k potentiometer (variable resistor)
One 0.047uF greencap
One 0.047uF disc ceramic
Three 10uF, 16 volt electrolytic
One protection diode (1N4002 or similar)
Two NPN types DS548 or similar
One battery clip
One 8-ohm loudspeaker
One audio transformer 8 ohm to 1k ohm
Ten lengths tinned copper wire
Two 10cm lengths insulated hook-up wire
Two 20cm lengths insulated hook-up wire
28 self-tapping screws with washers
Baseboard and project overlay No. 15