This circuit was found in a documentation of the time. It consists of a receiver with two RF stages for the medium wave band. The audio power is on the order of 2 W.
Although it is a common configuration today, these circuits were taken from an old publication. The...
The cut-off frequency of the filter shown in the figure can be adjusted to values between...
This flasher or light pulsator can be used in an ordinary flashlight. The circuit can be adapted to...