This is a 1960s amplifier setup found in a period publication. The circuit uses a special driver transformer that inverts the phases of the signal to excite the output transistors.
November 2016 - Mouser Electronics already has the Arduino Shield 101 for IoT applications with...
This directed coupled amplifier uses a transformer to drive a low impedance loudspeaker. This...
This circuit is based on an old Siemens integrated that can now be found very easily. It allows the...