BasicB-002-003-005
Why should local communications use VHF and UHF frequencies instead of HF frequencies?
C
Answer
Licensing, station identification, and operation
Type
A
Because signals are stronger on VHF and UHF frequencies
B
Because HF transmissions are not propagated locally
C
To minimize clutter on HF bands more appropriate for long-distance communication
D
Because greater output power is permitted on VHF and UHF
Answer Notes
HF (High Frequency) bands have the unique ability to bounce signals off the ionosphere, allowing them to propagate across continents and oceans. Because these bands are highly valued for long-distance (DX) communication, their limited bandwidth can quickly become crowded.
VHF (Very High Frequency) and UHF (Ultra High Frequency) signals travel primarily via line-of-sight, making them highly effective for local and regional contacts. By choosing VHF or UHF for local conversations, operators practice good band etiquette by keeping the HF bands clear for those attempting long-distance contacts.
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When should you consider using simplex operation instead of a repeater?
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Why should you be careful in choosing a simplex frequency when operating VHF or UHF?