This small tube amplifier appeared in Radio Electronics magazine in February 1958. The circuit is powered by the mains with a power transformer and output with different impedances.
This oscillator uses a small transistor amplifier or radio output transformer. We found it in a...
This small transmitter circuit has a range of about 100 meters, and the antenna must be connected to...
In the figure we have the way to connect several 555 to obtain sequential operation. The component...