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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
Quick Index
Practice Test
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Element 4
E4
E4B
E4B03
E4B03:
Which S parameter is equivalent to forward gain?
S11
S12
S21
S22
E4B01
E4B02
E4B03
E4B04
E4B05
E4B06
E4B07
E4B08
E4B09
E4B10
E4B11