Circuit Project Electronic

This circuit is the circuit amplifies very small-sized use 4 transistors and use the low power supply about 4.5V only. Then build easy. It is convenient for use in many the work such as , intercom, microphone, telephone pick-up coil, and general audio monitor etc. This circuit has power booster about 250. But inappropriate with large-sized loudspeaker for a place turns on the power should with battery 4.5V or Three cell battery packs 1.5V x 3 all right. By very circuit is the character OTL. You can use C 1000uF for Low Frequency 50 HZ. For most transformerless audio amplifiers drive small 8 ohm speaker. The detail is other see in the circuit.
Source: http://www.techlib.com

Related Links
Classic Tone control circuit with low noise transistor
The multi-purpose Amplifier using TDA2030
LM379 power amplifier OTL stereo
Small IC Amplifier 2 watt using LM380
LM379 power amplifier OTL stereo