Demonstration of standing waves on a string. How the standing waves are generated, harmonics and more is explained here.
By James Dann for ck12.org CC-BY-NC-SA
The same day that the FCC put ARRL’s Technician Enhancement petition on public notice, it also invited comments on another proposal, designated RM-118... Read more
Participation appears to be growing in the monthly Federal Emergency Management Agency (FEMA) Region X HF interoperability exercises, which take place... Read more
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