Total posts : 45366
Jim Hawkin’s description of how high power AM RF combiners work is very fascinating. Stating that it is “like a reversed loudspeaker crossover network” gives a really clear perspective about what is actually happening.
Consider this idea: two transmitter exciters, consisting of two oscillator and two buffer sections on two frequencies, let’s say 1550 and 1680. Second, we build the combining circuit to properly match the two signals, set the one final RF stage so that it is receiving an input of 100mW consisting of combined RF, one modulation section so both frequencies will have the same audio.
Would it pass inspection?