60 watt bass amplifier


Posted on Feb 7, 2014

The advantages for a guitar amplifier are the very simple circuitry, even for comparatively high power outputs, and a certain built-in degree of loudspeaker protection, due to capacitor C8, preventing the voltage supply to be conveyed into loudspeakers in case of output transistors` failure.


60 watt bass amplifier
Click here to download the full size of the above Circuit.

The preamp is powered by the same 60V rails as the power amplifier, allowing to implement a two-transistors gain-block capable of delivering about 20V RMS output. This provides a very high input overload 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). 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 across 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 wave form at maximum output power.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Stand Alone 600mA Li-ion Battery Charger
    simple microphone preamplifier
    Digital-Circuits
    Animatronic Mouths Circuit
    LEDs and resistors circuit
    AC DIGITAL CLOCK WITH STANDBY BATTERY
    Yves OESCH HB9DTX Transceivers modifications
    Audio Signal Generator
    The microprocessor circuit using a power linear regulator
    Days to TN-1 Intelligent negative pulse charging circuit



    Top