Amplifiers circuit diagrams

Headphone Amplifier

An amplifier to drive low to medium impedance headphones built using discrete components.

Buffer Amplifier

hifi preamplifier designed to convert high output impedance amplifiers to 600 ohm outputs.

Mini Portable Guitar Amplifier

Can be fitted into a packet of cigarettes. Also suitable as Fuzz-box

24 Watt Class A Amplifier

A 24 Watt Class A Amplifier made from discrete semiconductors, built and tested by Marc Klynhans from South Africa.

The GEM Class-A/AB Amplifier

Mini Guitar/Bass Amplifier

Output power: 6W into 4 Ohm load. FET input stage - Passive Tone Control

200mW Stereo Amplifier

A small battery driven amplifier with 200mW output. This is a suitable amplifier for portable radios and other battery powered equipment.

2 Watt Amplifier

A 2 Watt audio amplifier made from discrete components.

The GEM: Class-A/AB Amplifier

The GEM is an audio power amplifier embodying simultaneously active Class A and Class AB output stages for 100+ Watts into a 4 ohm loudspeaker. The front end pcb will drive up to 100+W variants, or the 200+ Watts version into a 4 ohm loudspeaker load.

32 Watt Amplifier

A 32 Watt per channel stereo power amplifier made using the TDA2050V monolithic integrated circuit.