Found in an 1868 Mullard documentation this circuit has a dynamic range of 10 Hz to 25,000 Hz. Modern equivalent transistors can be used.
This circuit generates three outdated signals whose frequency is given by the time the signals...
We find this circuit in the 80's own component manual. The power supply should be from 4 to 30 V...
This flasher for incandescent lamps was found in Radio Electronics from the 80's. The circuit uses...