This simple 1-transistor audio preamplifier appeared in the June 1968 Radio Electronics magazine. The transistor is a general-purpose type of the time. The gain is 14 dB.
The component used, which is not common today, is an electronic attenuator. In this application of the...
Found in Analog Devices documentation, this circuit uses components from the time. Formulas for...
This circuit was found in a Radio Electronics magazine from October 1987. It can be used as a...