This circuit was found in a Radio Electronics from February 1966. With it it is possible to trace the curve of a tunnel diode visualizing it on an oscilloscope.
This oscillator, from an old Argentine publication from 1973, uses the inductance of the 500 ohms...
Found in Popular Elecronics, this configuration also appears in this section, but obtained from other...
The operational ones used in this project are old types from National Semiconductor, since the...