This small audio amplifier circuit in complementary symmetry was found in the 1974 Mullard Databook. The output pair can also be the BD135 and 136.
This circuit in a receiver that allows the capture of distant stations with short waves. The...
This simple circuit of low power with an LM386 includes the highly sensitive audio preamplifier...
This circuit is from old documentation but can be applied to modern equivalent components. The...