What is the effective radiated power (ERP) of a repeater station with 150 watts transmitter power output, 2 dB feed line loss, 2.2 dB duplexer loss, and 7 dBd antenna gain?
Answer286 watts
Subtract the 2 dB feed-line loss and 2.2 dB duplexer loss from 7 dBd antenna gain, leaving +2.8 dB. Applying that gain to 150 watts gives about 286 watts ERP.