Guitar Amplifier


Posted on Feb 5, 2014

The aim of this design was to reproduce a Combo amplifier of the type very common in the `sixties and the `seventies of the past century. It is well suited as a guitar amplifier but it will do a good job with any kind of electronic musical instrument or microphone. 5W power output was a common feature of these widespread devices due to the general


Guitar Amplifier
Click here to download the full size of the above Circuit.

adoption of a class A single-tube output stage (see the Vox AC-4 model). Furthermore, nowadays we can do without the old-fashioned Vib-Trem feature frequently included in those designs. The present circuit can deliver 10W of output power when driving an 8 Ohm load, or about 18W @ 4 Ohm. It also features a two-FET preamplifier, two inputs with different sensitivity, a treble-cut control and an optional switch allowing overdrive or powerful treble-enhancement. In all cases where Darlington transistors are used as the output devices it is essential that the sensing transistor (Q4) 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.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

USB Development Board
Solid State Relay Required Only 50uA Drive Current
arduino Sharp IR distance sensor outputting consistently high voltage
Frequency Doubler
Simple Infrared Control Extender
Cycle 100 MHz frequency counter circuit diagram
Air conditioner microcomputer control circuit



Top