This amplifier stage without an output transformer was found in Radio Electronics magazine from October 1963. The supply is 12 V, and the output is 8 or 16 ohms.
This amplifier with differential input uses two old op amps but can be implemented with modern op amps....
The main feature of this circuit is that it provides a sine waveform signal. In this circuit, the...
The HA2620 integrated circuit used in this comparator is from the 80's, but the setting can be...