50W POWER AMPLIFIER WITH IC TDA7294 CIRCUIT SCHEMATIC DIAGRAM

50W POWER AMPLIFIER WITH IC TDA7294 CIRCUIT SCHEMATIC DIAGRAM

With the addition of a handful of parts and a suitable power supply, this module will deliver over 50W RMS into 4 or 8 ohms with < 0.1% Total Harmonic Distortion (THD) and < 0.1% Intermodulation Distortion (IMD). A similar circuit was published in Elektor magazine, 11/96.

It is also suitable as a replacement power amp stage, or upgrade for many existing amplifiers of between 30W-50W, provided they have a suitable dual supply, and most do.

50W AF POWER AMPLIFIER WITH STK4036II CIRCUIT SCHEMATIC DIAGRAM

50W AF POWER AMPLIFIER WITH STK4036II CIRCUIT SCHEMATIC DIAGRAM

STK4036II features:
• Compact package for thin-type audio sets
• Member of pin-compatible series with outputs of 20 to 200W
• Easy heatsink design to disperse heat generated in thintype stereo sets
• Constant-current circuit to reduce supply switch-on and switch-off shock noise
• External supply switch-on and switch-off shock noise muting, load short-circuit protection, thermal shutdown and other circuits can be tailor-designed.

70W HIGH POWER AMPLIFIER WITH MOSFET CIRCUIT SCHEMATIC DIAGRAM

70W HIGH POWER AMPLIFIER WITH MOSFET CIRCUIT SCHEMATIC DIAGRAM
There are possible alternative input stage transistors, the Toshiba 2SA970BL and 2SC2240BL, which appear to be good substitutes for the Hitachi 2SA1085E and 2SC2547E. The ‘BL’ suffix is the high gain group. Alternatives for the Sanyo 2SC2911 and 2SA1209 are the Toshiba 2SC3423 and 2SA1360.

68W POWER AMPLIFIER WITH LM3886 CIRCUIT SCHEMATIC DIAGRAM

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

22W POWER AMPLIFIER WITH TDA1554 SCHEMATIC DIAGRAM

22W POWER AMPLIFIER WITH TDA1554 SCHEMATIC DIAGRAM

A few externel components required to support the main component. Heatsink on the power IC is a must.

2x90W STEREO TUBE POWER AMPLIFIER WITH EL34 CIRCUIT SCHEMATIC DIAGRAM

2x90W STEREO TUBE POWER AMPLIFIER WITH EL34 CIRCUIT SCHEMATIC DIAGRAM

The document in PDF version contain of schematic diagram, part list, component guide, step by step how to build the circuit. This circuit is for advance hobbysts.

CIRCUIT 50 WATT POWER AMPLIFIER SCHEMATIC DIAGRAM

CIRCUIT 50 WATT POWER AMPLIFIER SCHEMATIC DIAGRAM
The amplifier uses a pair of power transistors that are MJ2955 and 2N3055 to amplify the input signal. You must use a heatsink on those transistors.

CIRCUIT 35W TUBE POWER AMPLIFIER WITH EL34 SCHEMATIC DIAGRAM

CIRCUIT 35W TUBE POWER AMPLIFIER WITH EL34 SCHEMATIC DIAGRAM
This tube amplifier designed in 1953 and worked from 1954 until 1989.

CIRCUIT 35W POWER AMPLIFIER BASED ON LM391 SCHEMATIC DIAGRAM

CIRCUIT 35W POWER AMPLIFIER BASED ON LM391 SCHEMATIC DIAGRAM
Transistors Q3-4 should be placed on heatsink. If are used the Q3-4 in packing TIPxxxx they can be placed straight above in PCB. If however they are used transistor in packing TO-3, then it will be supposed they are connected with short cables in the corresponding places on PCB.

CIRCUIT POWER AMPLIFIER 2000 WATT SCHEMATIC DIAGRAM

CIRCUIT POWER AMPLIFIER 2000 WATT SCHEMATIC DIAGRAM

This is linear amplifier which need advance knowledge in electronics since the schematic diagram is very complex for hand made circuit.