This Motorola circuit is from 1965. Collector currents must be 7 and 12 A for transistors. Equivalents may be used. The circuit is for contact breaker cars.
This microphone preamp allows the use of high impedance crystal microphones with amplifiers that have...
For reference only, this is the second IF amplifier stage of a common transistor radio from the...
This circuit can gerenate square signals and be comanded by na external control. When the input...