StacksVerified U.S. regulatory reference

47 CFR §80.771

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Compute the + 17 dBu contour as follows:
  1. (a)Determine the effective antenna height above mean sea level according to the procedures in §§ 80.757-80.761.
  2. (b)Determine the effective radiated power according to § 80,765. Determine for each radial the distance from the antenna site to the + 17 dBu point of field strength using procedures of §§ 80.765 and 80.767.
  3. (c)Plot on a suitable map each point of + 17 dBu field strength for all radials and draw the contour by connecting the adjacent points by a smooth curve.