Where:
Antenna input power = Ep * Ip * F
Ep = DC input voltage of final radio stage.
Ip = Total DC input current of final radio stage.
F= Efficiency factor.
Factor(F) | Method of modulation | Maximum rated carrier power | Class of amplifier |
0.70 | Plate | 1 kW or less | |
.80 | Plate | 2.5 kW and over | |
.35 | Low level | 0.25 kW and over | B |
.65 | Low level | 0.25 kW and over | BC1 |
.35 | Grid | 0.25 kW and over |
1 All linear amplifier operation where efficiency approaches that of class C operation.
47 C.F.R. §73.51
Secs. 4, 5, 303, 48 Stat., as amended, 1066, as amended, 1068, 1082, as amended; 47 U.S.C. 154 , 155 , 303 . Interpret or apply secs. 301, 303, 307, 48 Stat. 1081, 1082, as amended, 47 U.S.C. 301 , 303 , 307