Gemanium Transistors DC Amplifier (CB14775E)

This instrumentation circuit was found in the 1960 transistor application manual. More modern transistors can be used.

Headphone Control Center (CB16383E)
This is the project we have described, as found in a 1981 documentation. In the figure we show the...
RIAA Preamplifier III (CB958E)
This circuit was adapted from an Italian publication that no longer exists. This is “Onda Quadra”...
NOR Gate with Operational (CB19398E)
This NOR gate uses an uncommon operating system today but can be implemented with more modern...