Total posts : 45366
Academically, even cheap coax is very low loss at MW frequencies. RG6 which is readily available loses 0.2dB/100ft at 1MHz. That means 95% of the power delivered into one end of a 100’ piece of RG6 at 1000 kHz comes out the other end. For that to be seen in the real world, the final transistors of the transmitter would need to be matched to the feed line impedance, and a matching network would be needed between the transmission line and the antenna at the other end. Or if the transmitter and antenna were well matched, a ½ electrical wavelength piece of coax would show the transmitter the antenna’s impedance and the antenna the transmitter’s impedance.