StacksVerified U.S. regulatory reference

47 CFR §73.190

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)This section consists of the following Figures: 2, r3, 5, 6a, 7, 8, 9, 10, 11, 12, and 13. Additionally, formulas that are directly related to graphs are included.
  2. (b)Formula 1 is used for calculation of 50% skywave field strength values.
  3. (c)Formula 2 is used for calculation of 10% skywave field strength values.
  4. (d)Figure 6a depicts angles of departure versus transmission range. These angles may also be computed using the following formulas:
  5. (e)In the event of disagreement between computed values using the formulas shown above and values obtained directly from the figures, the computed values will control.