Audio Mixer by FET 2N3819
This circuit be Audio Mixer Circuit by FET 2N3819 numbers, build easy and the a little equipment. By this circuit lets to use the microphone since two go up or use other tool all right wasp suit amplifier same microphone. The R1 and R5 will control value reduction input each beside. Thus R1 , and , R3 be the controller equilibriums.
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Categories: Pre Amplifier Tags: 2N3819, audio mixer, Pre Amplifier
Dynamic microphone Amplifier for earphones
I decided to make this circuit so that I could listen to faint noises. It is a simple two-stage transistor amplifier design. The circuit was designed to use the input from a dynamic microphone but I am sure that with some modifications it would be possible to use an electret microphone. The 2N3053 transistors used in the design don’t have a particularly high gain so other types could probably be used as long as they are NPN.
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Source: http://www.geocities.com/electronics3456/soundamp.html Thank you.
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Categories: Pre Amplifier Tags: Head phone amplifier, Pre Amplifier, Pre-MIC
Stereo Preamplifier with adjustment tone by TCA5550
Many times we needed to use a simple circuit of preamplifier, with few components and facility of made. This circuit use a opamp. the Motorola, TCA5550, that contains a double amplifier, as outputs for the adjust of volume, balance, treble and bass. These adjustment of all parameters become from a line monophonic linear potesometers, increasing by far the facility of manufacture. The placement these potesometers should become as much as possible, more near in IC1, so that is minimised the noise. The circuit does not require big current in order to it work.
Read More Source: http://users.otenet.gr/~athsam/preamplifier_with_adjustment_tone.htm Thank you.
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Categories: Pre Amplifier, Tone control Tags: Pre Amplifier, tone control circuit, Tone-control
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