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Sources
- NIST CODATA: speed of light in vacuum (exact)
- ARRL, "Single Band Dipoles" (468/f, add about 6 in to trim)
- ARRL TIS, "Antenna Here is a Dipole" (PDF, 468/f starting point)
Formulas checked against the sources above and our worked-example tests on 2026-10-16. Code sections are cited by number only; read the text in your adopted edition. Planning aid, not engineering, legal or code advice.