This VCO makes use of an RC4558 which is an operational amplifier with characteristics close to the 741. The circuit needs a symmetrical source, and the transistor can be a general purpose one like the BC548.
This VCO makes use of an RC4558 which is an operational amplifier with characteristics close to the 741. The circuit needs a symmetrical source, and the transistor can be a general purpose one like the BC548.