High Efficiency Verticals Dipoles Leading the way are the Sigma Series and they are the best verticals ever made and contest proven, with many World Records. With efficiencies between 91-99.9%, they have no equal. The Sigma design utilizes T-bars at each end of the vertical dipole for the most effective loading technique and on low band models, incorporates huge high-Q off-center loading coils. Sigma antennas are the new evolution in verticals. They are true vertical dipoles, no radials and their performance is unmatched by any other design. They are available in several models.   Sigma Vertical Dipoles: Sigma-5 - $ 599.00 20-17-15-12-10 meter vertical dipole 2' sections, 50' control cable std     Force 12 Sigma-5 20-17-15-12-10 mtr vertical dipole 2' sections 50' control cable standard perfect for Field Day, DXpedition or yard minimum 90% efficient on all bands and NO radials! lightweight at only 7 pounds and made of aircraft grade aluminum comes in 2’ sections, perfect for easy handling and traveling only 9’ tall and T-bars are a short 24” per side (48” total tip to tip) no tools are required for assembly Can be mounted in a 5 gallon bucket of cement, placed on the ground and guyed once, use the optional 4-leg stand (made in 2’ sections, too), or any method you might need VSWR less than 1.7:1 maximum on 17-15-12-10 meters and <2:1 on 20 meters In 2004, I won 1st place, US and Canada, Low Power 20 meter phone. Asking $300 or BO. Write wb1hbb@gmail.com and pick up in West Delray. This will go fast. Write now! Warren, W4WR