Suitable for audio signals in electronic music, this circuit was published in the September 1973 issue of Radio Electronics magazine. The transistors were general-purpose types at the time.
This circuit was obtained from an American documentation from the 1980s. The T1 triggering...
Found in a 1974 Ferranti manual, this circuit uses diodes to limit the voltage on the transistors. The...
This circuit is from an English publication of 1991. With it you can use a common multimeter on...