For a given ham band its lower and upper band edge frequencies are converted by the famous 468/f to dipole lengths. QST, Oct 1926, "The Length of the Hertz Antenna" shows in line 2 of the table that a ...

When it comes to amateur radio ... a compatible antenna, which then moves a wiper along a coil to change the electrical length of the antenna, allowing it to resonate on the radio’s current ...