This circuit is from an Electronics World of 1967. The described calculations can be applied to equivalent circuits with modern transistors.
This is one of the first solid state laser projects. It was found in the June 1972 issue of Radio...
The integrated circuit used in this project is not common today. It was found in a 2000...
This 3-decade operating range VCO was found in a 90s Popular Electronics. The circuit uses...