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.
By connecting a common diode in series, it is possible to add temperature stability to the...
This circuit makes use of a Texas Instruments LinMOS operating system and requires the use of a...
This simple 1-transistor audio preamplifier appeared in the June 1968 Radio Electronics magazine. The...