This amplifier stage was equipped with a Motorola radio from the 70s. The transistors were from that time and the single transistor output used an autotransformer.
This circuit, from the 90's, is intended for operation with vinyl record players of the time, as...
This circuit, in fact, what it does is a reactivation of the batteries through a brief pulsating...
This circuit, for signals up to 1 MHz, is based on an RCA operational amplifier. The circuit was...