This circuit is from a Radio Electronics from March 1960. The generator works with a 22.5 V battery, generating good intensity signals determined by the LC circuit.
This circuit is from General Electric documentation from 1970. The transistors can be of...
This sophisticated decade of benchtop resistors was found in the November 1989 issue of Radio...
Found in a 1967 RCA manual, this circuit uses components from the era that can be replaced by modern...