We found this circuit in the 1992 special edition of the Electronics Experimenter Handbook. The components used are still current, many admitting equivalents.
The circuit shown in the figure was suggested by National Semiconductor in its 1994 Linear...
In the figure the well-known basic configuration of relaxation oscillator with unijunction...
This 2 meter (144 MHz) preamplifier is intended for use with portable transceivers. The...