For 1/2 wave dipole at 0.22 and 0.33 wavelengths above ground For Quad Loop antennas which have resonance input impediance close to 100 ohms *5.5" x 3.8" x 2.3" (*6.8" including flanges) Probably the most useful application of a 2:1 balun is in matching 50-ohm coaxial cable to the input of quad loop antennas. These broadband antennas generally have input impedances close to 100 ohms. When the half-wave diapole is at about 0.33 wavelengths above ground, its resonant input impedance is close to 100 ohms. This would create a VSWR of 2:1. Obviously, a 2:1 balun is needed here.

Model W2FMI-2:1- HB100

$79.95

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800-679-3184

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