This distorter for musical instruments was found in a 80’s Hands On Electronics. The transistor can be any general purpose and the components can be changed to modify the effects.
The diagram below is an application of the Texas Instruments TPS25221 to an ISM controlled power...
The OC30 power transistor is an old type of germanium from the 60s. This amplifier, using this...
This circuit was found in a 1973s Japanese publication. The power transistors used are of the era...