This is the power step of the previous circuit. Output transistors must be mounted on good heat sinks. The circuit is from documentation from the 60s.
Taken from a 1954 book by Rufus Turner, this amplifying step with PT2A transistors provides an...
This circuit was obtained from an American documentation from 1976. The circuit can be adapted to...
This oscillator can be controlled by light if we use an LDR as a sensor, or by temperature, if we...