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Portable Guitar Amplifier Circuit

Portable Guitar Amplifier Circuit Parts:

R1______________22K 1/4W Resistor

C1______________10µF 25V Electrolytic Capacitor
C2_____________100nF 63V Polyester or Ceramic Capacitor
C3_____________220µF 25V Electrolytic Capacitor

IC1__________TDA7052 Audio power amplifier IC

J1,J2__________6.3mm Stereo Jack sockets (switched)

SPKR___________8 Ohm Loudspeaker (See Notes)

B1________________9V PP3 Battery or
3V Battery (2 x 1.5V AA, AAA Cells in series etc.)

Clip for PP3 Battery or socket for 2 x 1.5V AA or AAA Cells


Portable Guitar Amplifier Technical data:

Max output power: 1.5W @ 9V supply - 8 Ohm load; 60mW @ 3V supply - 8 Ohm load

Frequency response: Flat from 20Hz to 20kHz

Total harmonic distortion @ 100mW output: 0.2%

Max input voltage @ 3V supply: 8mV RMS

Minimum input voltage for Fuzz-box operation: 18mV RMS @ 3V supply

Current consumption @ 400mW and 9V supply: 200mA

Current consumption @ 250mW and 9V supply: 150mA

Current consumption @ 60mW and 3V supply: 80mA

Quiescent current consumption: 6mA @ 9V, 4mA @ 3V supply

Fuzz-box current consumption: 3mA @ 3V supply