The element length and height above ground has been designed to optimize take-off-angle for HF skywave propagation from NVIS to 2000 kms. The RF-1912 can also be configured as a top-loaded monopole for short-range ground wave or long-range skywave. Both antenna configurations achieve near 100% radiation efficiency because they do not contain any resistive loads. Broadband operation does require an antenna coupler. The RF-1912 family is designed for use with transceivers operating at up to 1 kW RF output power. For broadband operation, from 1.6 to 30 MHz, the RF-1912 requires an RF-382, or RF-2601Antenna Coupler and associated cables.