2a3 Tube Amplifier
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Cornet2 Vacuum Tube Moving Magnet Phonostage
This phono stage significantly outperformed a sub-mini phono preamp. The phono preamp was exceptionally quiet when paired with a vintage Grado 8MR cartridge (not MC). It does not have a vintage sound; while it is pleasant and clearly tube-based, it...
Dynamic Microphone Preamp
This is a three-stage discrete amplifier with gain control. Alternative transistors such as BC109C, BC548, BC549, and BC549C may be used with minimal impact on performance. The first stage, built around Q1, operates in a common base configuration. This configuration...
tda2004-stereo-bridge-audio-amplifier.html
The TDA2004 integrated circuit (IC) is a popular choice among audio electronics enthusiasts due to its affordability and availability. This IC is often utilized in audio amplifier designs because it features two outputs and inputs, making it easy to implement...
50 watt PMS hi fi amplifier for an 8 ohm load
A 50-watt PMS hi-fi amplifier designed for an 8-ohm load. This circuit provides approximately 56 volts peak-to-peak across the 8-ohm load. The distortion level is around 1% at 20 kHz. A ganged switch at the input allows for the selection...
Circuit Audio Stereo power amplifier LM4755 11W with Mute
The internal mute circuit and pre-set gain resistors provide a cost-effective design solution. Output power specifications at both 20V and 24V supplies, along with a low external component count, offer significant value to consumer electronic manufacturers for stereo TV and...
Stereo Width Controllers
Sometimes, for a variety of reasons, it would be nice to vary the width of the sound stage when listening to stereo recordings. Although technically this is anything but hi-fi, it is a useful addition to PC speakers, or even...
Variable_audio_oscillator_with_a_range_of_20_hertz_to_20_kilohertz
A variable audio oscillator operates within a frequency range of 20 hertz to 20 kilohertz. The circuit utilizes an Intersil 8038 waveform generator, which is designed in a 14-pin dual in-line package (DIP).
The variable audio oscillator circuit is designed to...
Audio Oscillator Ii
The circuit's frequency oscillation is given by the formula f = 2.8 / [Cix(i1 + i2)]. By utilizing the specified values, the output frequency can be adjusted from 60 Hz to 20 kHz by rotating potentiometer R2. A portion of...
Stereo Preamplifier with adjustment tone
Cleaned Input: Many times we needed to use a simple circuit of preamplifier, with few components and facility of made. This circuit uses an opamp, the Motorola, TCA5550, that contains a double amplifier, as outputs for the adjust of volume,...