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AF Power Amplifier and Preamplifier Schematics

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PPA v1 Amplifier Board

PPA v1 Amplifier Board

The PPA is ppl's Portable Amplifier. ppl has been building and advocating Jung multiloop type buffered headphone amp designs.

http://tangentsoft.net/audio/ppa/amp/

Single Chip 50 Watt / 8 Ohm Power Amplifier

Single Chip 50 Watt / 8 Ohm Power Amplifier

Uses National Semiconductor LM3876 Power IC. Voltage gain is 27dB.

http://sound.westhost.com/project19.htm

Bridge/Parallel Amplifier (BPA-200) Documentation

Bridge/Parallel Amplifier (BPA-200) Documentation

200W audio amplifier solution using multiple LM336s and and design concept to reach even higher output power levels.

http://www.national.com/appinfo/audio/files/BPA-200_Application_Note.pdf

Crest Audio LT Series LT100, LT1500 and LT2000 Schematic Set

Crest Audio LT Series LT100, LT1500 and LT2000 Schematic Set

A commercial Class D Amplifier, complete schematics in pdf format.

http://www.crestaudio.com/media/pdf/lt_schematic.pdf

Do It Yourself Car Amplifier by Mr. T. Giesberts

Do It Yourself Car Amplifier by Mr. T. Giesberts

This article is for those who wants to make their own car amplifier. In this article, I will discussed the car power amplifier in 3 steps : 1.The design of audio power amplifier, 2. The design of DC-DC converter, 3. Miscellenous tips for making car power amplifier.

http://members.tripod.com/valveaudio/Membuatsendiri.htm

Vahvistin National Semiconductorin LM3886

Vahvistin National Semiconductorin LM3886

The LM3886 is a high-performance audio power amplifier capable of delivering 68W of continuous average power to a 4Ohm load and 38W into 8Ohm with 0.1% THD+N from 20Hz-20kHz

http://www.saunalahti.fi/elepal/vahvistin/vahvistin1.html

Ultra High Gain Audio Amplifier

Ultra High Gain Audio Amplifier

Source: National Semiconductor Linear-Applications-Handbook. Vo = /2 = 500; = Yfs / Yos

http://www.electronics.50g.com/cuhga.htm

3 Transistor Audio Amp (50 milliwatt)

3 Transistor Audio Amp (50 milliwatt)

Here is a little audio amplifier similar to what you might find in a small transistor radio.

http://ourworld.compuserve.com/homepages/Bill_Bowden/page8.htm


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