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.
This circuit eliminates transients that are 10% above the zener voltage. The transistor must be in...
This alarm is either activated or triggered after a certain amount of time, giving the owner time...
This circuit was found in the Italian magazine Radio Elettronica from September 1977. It is...