This sophisticated pulse generator was found in a Radio Electronics magazine from November 1985. It generates pulses from 1 to 100 us.
This regenerative circuit was found in a Japanese publication from the 1960s. Details of the coils...
This excellent amplifier with complementary symmetry output stage was taken from one of my audio...
This is a circuit found in a 1970's Radio Electronics. The circuit works with virtually any triac...