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Amateur Extra Class: 2020–2024
Today
Sections
E1: Commission's Rules
E2: Operating Procedures
E3: Radio Wave Propagation
E4: Amateur Practices
E5: Electrical Principles
E6: Circuit Components
E7: Practical Circuits
E8: Signals and Emissions
E9: Antennas and Transmission Lines
E0: Safety
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Element 4
E6
E6B
E6B09
E6B09:
What is a common use for point-contact diodes?
As a constant current source
As a constant voltage source
As an RF detector
As a high-voltage rectifier
E6B01
E6B02
E6B03
E6B04
E6B05
E6B06
E6B07
E6B08
E6B09
E6B10
E6B11