Found in old documentation, this circuit can be implemented even today with the use of a 2N2646 for the unijunction and a TIC106 for the SCR.
Found in a 1960 Sylvania manual, this circuit can be implemented with a modern equivalent...
This configuration, already presented in other points of this section and website, is of a...
We found this precise crystal oscillator for the 144 MHz band, depending on the crystal used. The...