Electronic Morse Key (CB7313E)

This circuit was found in the magazine of radio amateurs 73 in a 90's edition. The components are current and the transistor is of general use.

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200 mW Amplifier (CB21672E)
This amplifier was taken from documentation from the 1960s. Transistors are germanium types from...
Zener Diodes in Amplifiers (CB988E)
This configurations shows how to use a zener diode to have equal input and output voltages. The...
Fast adder 1 (CB7055E)
We found this circuit in an Electronic Engineering from the 90s. It applies to any logical family....