Ham Radio Exam Prep
Current Ham Radio Test Pools
Technician License 2018-2022
Free Practice Test: Technician
General License 2019-2023
Free Practice Test: General
Amateur Extra License 2020-2024
Free Practice Test: Amateur Extra
Gallery
Resources
LIVE
General Class: 2019–2023
Today
Sections
G1: Commission's Rules
G2: Operating Procedures
G3: Radio Wave Propagation
G4: Amateur Radio Practices
G5: Electrical Principles
G6: Circuit Components
G7: Practical Circuits
G8: Signals and Emissions
G9: Antennas and Feedlines
G0: Electrical and RF Safety
Quick Index
Practice Test
Help support WaveTalkers using
Buy Me A Coffee!
Element 3
G9
G9D
G9D04
G9D04:
What is the primary purpose of antenna traps?
To permit multiband operation
To notch spurious frequencies
To provide balanced feed-point impedance
To prevent out-of-band operation
G9D01
G9D02
G9D03
G9D04
G9D05
G9D06
G9D07
G9D08
G9D09
G9D10
G9D11
G9D12
G9D13