This 60's shield or driver employs germanium transistors. The circuit is from a 1960 Gernsback documentation.
This clipper or limiter circuit limits the amplitude of AM or FM audio signals. The diodes are...
This 9-bit DAC circuit was found in the RCA CMOS integrated circuits manual of the 1970s. The...
This is the common configuration of a crystal or galena receiver that uses a crystal or high...