This circuit, obtained from a 1965 magazine, can still be assembled using some modern equivalent components. The transistors may be BC558 and the transformer is obtained from a disused transistor radio.
This is a classic FM amplifier IF amplification stage configuration. The circuit is from a 1980s...
This staircase generator was found in the July 1991 issue of Radio Electronics magazine. Its...
This 80's circuitry decodes stereo signals used in analog TV at the time. The circuit can be used...