Tube Power Source (CB6743E)

This circuit is from a high voltage tube source. It does not include the filament voltage that must be supplied by a separate transformer.

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Logic Probes (CB11570E)
This circuit indicates the logical level of a CMOS circuit, extracting the power from the circuit...
Body Heat Detector (CB25684E)
Using a piezoelectric sensor of the time, this circuit was found in the February 1994 issue of...
Testing Diodes with the Oscilloscope (CB1488E )
The figure shows how to use an oscilloscope for diode test. The circuit presents the...