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 tone control was obtained from the CA3140 datasheet, originally created by RCA. The CA3140...
This is one of the many mixer versions with the 741 operational amplifier that the reader can find...
This 1 to 40 MHz amplifier is from a 1969 Motorola documentation. The components are of the time...