This is a commercial circuit from the year 1958. Transistors are germanium types and transformers and coils are hard to fild today. The circuit is destinated to the reception of medium wave stations.
This time base circuit for the oscilloscope was obtained from an Electronics Now from the 90s. The...
This relay time delay circuit was found in the October 1993 issue of Electronics Now magazine. The timing...
RF or even switching transistors like the 2N2222 can be used in this circuit. The capacitors are ceramic...