guitar amplifier electronic 60 watt


Posted on Feb 6, 2014

This Guitar Amplifier electronic architecture adopts a able-bodied accustomed ambit cartography for the ability amplifier, application a single-rail accumulation of about 60V and capacitor-coupling for the speaker(s). The advantages for a guitar amplifier are the actual simple circuitry, alike for analogously aerial ability outputs, and a assertiv


guitar amplifier electronic 60 watt
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e congenital amount of loudspeaker protection, due to capacitor C8, preventing the voltage accumulation to be conveyed into loudspeakers in case of achievement transistors` failure. The preamp is powered by the aforementioned 60V balustrade as the ability amplifier, acceptance to apparatus a two-transistors gain-block able of carrying about 20V RMS output. This provides a actual aerial ascribe afflict capability. * The Darlington transistor types listed could be too oversized for such a design. You can substitute them with MJ11014 (Q3) and MJ11013 (Q4) or TIP142 (Q3) and TIP147 (Q4). * D1 and D2 can be any Schottky-barrier diode types. With these devices, the harmonic modifier operation will be hard. Using for D1 and D2 two common 1N4148 silicon diodes, the harmonic modifier operation will be softer. * In all cases where Darlington transistors are used as the output devices it is essential that the sensing transistor (Q2) should be in as close thermal contact with the output transistors as possible. Therefore a TO126-case transistor type was chosen for easy bolting on the heatsink, very close to the output pair. * R9 must be trimmed in order to measure about half the voltage supply from the positive lead of C7 and ground. A better setting can be done using an oscilloscope, in order to obtain a symmetrical clipping of the output waveform at maximum output power.




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