This circuit was found in General Electric documentation from 1965. The transistors are from that time. The diodes consist of a component that contained them.
Found in a magazine 73 for radio amateurs, this circuit has two settings, one for the interval and the...
This good quality amplifier found in a 1982 documentation has a traditional complementary output...
A low frequency divider can be made using common unijunction transistors as shown by the figure...