Audio Oscillator (CB22250E)

This blocking oscillator was found in a publication from the 50's. The coils determine the frequency. The circuit uses a CK722 germanium transistor.

Wireless Wiretapping LM302 (CB19323E)
The integrated circuit used in this 90's circuit is not very common today. An equivalent...
Video Amplifier (CB26320E)
This circuit was found in a William Sheets. It has 75 ohms of output impedance and can operate up to 20...
Bidirectional Current Sensing NCS21xR (CB19648E)
This circuit was obtained directly in the component's datasheet, and in it we have the use of...