This regulator circuit is from Motorola documentation from 1969. It makes use of an integrated regulator of the time. With the indicated transistor, a current of up to 5 A can be obtained.
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...