NB6G This calculation isn't done this way. The power consumed by your battery and the radio's RF output power are calculated using different algorithms.
Radio transmitter power
This refers to the total input power of a radio transmitter, which typically includes the power consumption of all components such as the RF amplifier, power supply, and control circuit. The unit is usually in watts.（W）Or kilowatts (kW).
For example, a 100W shortwave radio transmitter might actually output only 70W of RF power, with the remaining 30W lost due to heat and circuit inefficiency.
Radio frequency power (RF Power)
Specifically refers to the actual RF signal power radiated by the transmitter through the antenna, i.e., the effective radiated power.（ERP）Or equivalent omnidirectional radiated power（EIRP）The unit is also in watts.（W）However, antenna gain and cable loss must be considered.
For example, if the antenna gain is 3 dB, the EIRP of a 100W RF power can reach 200W (due to the gain, the power is doubled).
Convert relationship
RF power = Radio transmitter power × Transmitter efficiency (typically 50%)70%）
Actual radiated power（EIRP） = RF power × antenna gain - cable loss
Example calculation
If the radio input power is 100W, with an efficiency of 60%, a gain of 3 dB (twice), and a feedline loss of 1 dB (approximately 20%):
RF power = 100W × 60% = 60W
EIRP = 60W × 2 × 0.8 ≈ 96W
The following information comes from DS...
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