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CUASICOMPLEMENTARIO

AMPLIFIER 100 WATTS CUASICOMPLEMENTARIO

This amplifier power is not only acceptable, it is also very easy to build, which is recommended for people who want to learn and understand the transistor.

This configuration is known as quasi-complementary class AB amplifier with Darlington pair, and incorporates an NPN transistor Darlington pair and a pair consisting of a retro powered transistor NPN and one PNP.
output transistors are capable of handling similar NPN high power. D400 and A683 transistors are complementary and do not need high power handling.

Remember that the output transistors are isolated from the heatsink with mica insulators and silicone grease for heat trasnsmitir aluminum.

With a load of 8 Ohm speakers, and a voltage of 63V DC, maximum performance you can get is 50 W per channel.

To build this amp, you must build the power supply simple , Found in the projects section .

For this amplifier is recommended to use loudspeakers, between 100W and 200W of power, with an impedance of 8 Ohms.

The rheostat (VR1), serves to focus the medium voltage (vcc Medium). The midpoint is more or less in 58K.El resistor (VR2) is to remove the crossober (distortion at the center wavelength), the measurement is between 8 and 10 ohms. You can place a fixed resistor, but in case of the 63v source is not accurate, or the simple fact that the components are not exact, the resistors can be very useful in focusing the appropriate point and to prevent damage.

>>> Download here << < PDF file with the plans and the form of 100-watt amplifier.