This Power supply sources from 500 to 1,000 mA according the transformar and was found in a publication of the year 1958. The diodes can be now the 1N4004 and the transistor should be mounted on a heatsink.
We found this basic mixer with the 741 integrated circuit in a 1992 publication. The battery is...
Suggested by General Electric in a 1968 documentation this integrated amplifier uses a component of...
Suggested by Siliconix in documentation from the 90s, this amplifier has its gain digitally...