*** PLEASE ORDER THIS FOR LEGACY FORCE12 TRIBAND / MULTIBAND ANTENNAS ONLY ***
The EB-2 is an external bead balun. It is constructed of a length of Teflon coaxial cable surrounded by 25 ferrite beads. At one end of the cable is a UHF coax connector that mates with the popular PL-259 cable-end connector; at the other end are wire leads to facilitate connection to a dipole or driven element. The wire leads are color-coded for ease of phasing multiple elements or antennas; white = coax center. These baluns are vacuum impregnated and sealed against weather. The exterior surface is paintable. Freq. range: 10 through 60 MHz. Power: 2,500W, CW; 3,000W PEP.
A balun’s purpose is to allow connecting a BALanced load (e.g., a dipole or driven element) to an UNbalanced line, thus the name. In transmitting antennas, this is accomplished by presenting a high impedance to RF currents flowing outside the coax shield. This forces currents in each side of a driven element to be equal. This is especially important in beam antennas because it prevents distortion of the beam’s pattern caused by unequal currents in the drivers). In a simple dipole, the balun assures that the dipole, and not the feed line, is doing the radiating.