10WATT TUBE HI-FI AMPLIFIER WITH PREAMPLIFIER (6N1P - 6N2P 807 OR EL34)


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100 W 8 ohms MOSFET amplifier with IRF9540 - IRF540

The Schematic Diagram is a basic MOSFET amplifier. Output power is 100 Wrms under 8 ohms or 160 Wrms under 4 ohms with distortion is 0.001 %. Bandwidth at -3 db is from 4 Hz to 100 Khz .
100 W 8 ohms MOSFET amplifier with IRF9540 - IRF540 1
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VU Meter with UAA180


VU Meter with UAA180 circuit

The circuit was designed based on the operation of Siemens UAA180 as it functions as a LED driver for light band displays for measuring the level of audio signals.
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90WATT VALVE POWER AMPLIFIER WITH EL34 + ECC83 + ECC82

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Stereo Digital Volume Control with DS1802

Stereo Digital Volume Control  with DS1802
The DS1802 is a dual audio taper-potentiometer having logarithmic resistive characteristics over the device range. Each potentiometer provides 65 wiper positions with a 1 dB increment per step and device mute. The DS1802 has two methods of device control, which include contact closure (pushbutton) inputs and a 3-wire serial interface for wiper positioning. The pushbutton control inputs provide a simple interface for device control without the need for a CPU.
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Audio equalizer with transistors BF245 - BC109

Audio equalizer with transistors BF245 - BC109

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LM-3875 Amplifier with ECC88 Tube Buffer

LM-3875 Amplifier with ECC88 Tube Buffer
TECHNICAL SPECIFICATIONS

Power Supply- toroidal transformer 230V/8*12V/180VA
- output amplifier rails 2*32V DC(2*24V), two bridges with two BYW95C diodes in parallel
- caps Samsung 470uF/100V, four per channel.
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