This circuit can function as a high-power shield completely isolated from the power grid. We found it in the Electronics Now magazine of June 1995.
This 1965 Philips circuit uses old company transistors like the BFY51 and BFY50. The circuit is...
This Popular Electronics circuit can be found in various versions on this site and in this...
June 2017 - ECM032 series of SMD quartz from ECS crystals can now be obtained from Mouser...