This circuit was designed to obtain a valve-like distorted sound
from an electric guitar or other musical instrument.
For this purpose a very high gain, three-FET amplifier circuit, was
used. The output square wave shows marked rounded corners, typical of
valve-circuits when driven into saturation.
Therefore, the distorted sound obtained from such a device has a
peculiar tone, much loved by most leading guitarists.
Download skema :
Download skema :
Guitar Fuzz Box
Password : asinan
Circuit set-up using oscilloscope and sine wave generator:
Connect a 1KHz sine wave generator to J1 and the oscilloscope to J2.
Adjust R4 until the output square wave shows equal mark-space ratio.
"By ear" circuit set-up:
Connect a musical instrument to J1 and an amplifier to J2.
Carefully adjust R4 in order to obtain as maximum output sound intensity as possible.
Connect a 1KHz sine wave generator to J1 and the oscilloscope to J2.
Adjust R4 until the output square wave shows equal mark-space ratio.
"By ear" circuit set-up:
Connect a musical instrument to J1 and an amplifier to J2.
Carefully adjust R4 in order to obtain as maximum output sound intensity as possible.
