Found in Philips documentation from the 1970s, this circuit uses components from the era. The stability is 0.045% per centigrade degree.
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...