Found in a 1968 EEE, this circuit accepts frequencies from 1 to 1000 Hz and control voltages from 0.1 to 15 V. The operational amplifier is from the era and can be replaced by modern equivalents.
This amplifier for effects on musical instruments can be mounted with BC549 transistors. The...
This circuit was found in documentation from the 1980s. The circuit uses several components of the...
The presented circuit can use an equivalent transistor like the BC548. The configuration, which [is...