RF power meter (CB8977E)

This reflectometer or standing-wave ratio meter (SWR) was found in a 1980s American documentation. The diodes support general purpose equivalents.

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Wien Bridge Generator (CB39010E)
This sophisticated sinusoidal audio signal generator uses a Wien bridge configuration with an...
Serial Port Stepper Motor Control (CB15386E)
The circuit shown in the figure makes it possible to control a stepper motor via the serial port...
Power sensitive relay (CB22293E)
This circuit was found in a documentation from the 60s. The drive transistor is a power...