Found in an old American publication, this circuit generates signals of various waveforms. The frequency depends on the components. Operational amplifiers are from the period.
This VHF receiver with three transistors and loudspeaker listening was found in European...
This sensor was published in Radio Electronics magazine in April 1962. The two-transistor circuit...
This circuit consists of a monostable multivibrator using the LM3900 transconductance operational...