20M short loaded vertical antennas.

3 different vertical antennas for 20M

• 20M vertical mid-loaded 2x3 mtr (2x10 ft) dipole

• 3 mtr (10 ft) mid-loaded monopole with one elevated radial

• 20M vertical 3 mtr (10 ft) monopole with slinky® coil "counterpoise"

Read more at: https://www.nonstopsystems.com/radio/frank_radio_antenna_vert_dipole.htm