I have some TA7642 TO-92's and have been looking at circuits such as the attached. Most show the tank and maybe even the variable capacitor rating but not the inductor size. Would I be wrong in taking the midpoint of the AM band say ~1MHz as the resonant frequency, midpoint of the variable capacitor range to solve for the inductor size? Once I have that size I may want to follow up with winding the coil. Any help will be much appreciated.