This circuit was found in a 1967 General Electric documentation. The components are from that time. The load depends on the SCRs used.
This 1992 circuit uses a common LM139 comparator today, but it can be built with equivalent...
This TTL circuit generates a 100 MHz signal for digital instruments. The CI is not easy to obtain,...
This very simple 1-transistor oscillator is from Raytheon's transistor manual of the 60s. The...