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.
This small Hartley oscillator uses an output transformer for transistors. The frequency is...
This circuit intermittently activates a relay. It was obtained in a 1980 publication. In fact, we...
This circuit was found in Motorola documentation from 1968, using high power transistors and...