This Mullard circuit was found in a 1969 documentation. It uses complementary transistors on the output and does not need a transformer. The bandwidth goes from 100 to 20 000 Hz.
Found in a Radio Electronics we have in the figure a circuit to disconnect an SCR with direct...
This two-stage circuit has a voltage gain of 100 times, with a high input impedance. The circuit is...
This circuit was obtained from a 90s Radio Electronics. The integrated circuit used HAA11508 is not...