This question is related to part 15 AM broadcasting, but I know the experts are here and this same question could relate to any frequency in the ham bands. I have a 100 mw TX that transmits @ 1690 am. It comes with a 3 meter whip antenna. Per the manufacturer, the antenna output is at a high impedance. The could not tell me the exact impedance though. The rule says I can use any antenna 3 meters or less in physical length. I have a 160 meter Valor Pro-Am mobile antenna. I exchanged the factory whip for a longer one and it is now tuned for 1.69 mhz, It's input impedance is 52 ohm. What is the best way to match the TX to the antenna with minimal loss?