ok tryin to learn loading coils. tuners and antennas. iam wondering if i understand this a little if at all. the inductor say is built to 10 henrys. size and such no importion right now.. at 10h it resonates at say 3.9mhz but to resonate at say 7.2mhz you change the tap in turn chaging the value of henrys. to make it resonate at 7.2 the variable caps in a tuner is for fine tuning the coil to get to resonates. you would build a coil to your lowest op freq say 3.9 and it should in turn work from 3.9 to say 18.15mhz so up in henrys is lower in freq. down in henrys is higher in freq. or am i way off base.. remember please.. iam a ID 10 Error here lol ..