In the figure we have a stereo decoder from the 70's with pilot lamp for signal indication. The circuit employs a component of the time, which is uncommon today.
Other operational amplifiers series, such as the MC34072, MC34074, MC35071, MC35072, MC35074 d...
We can use this amplifier with low impedance headphones with good performance. Possible...
This circuit was found in the May 1989 issue of Radio Electronics magazine. The circuit requires a...