Force 12 Sigma-40XK Info

Can be set to any frequency 5-30 MHz		Comes with 40-30-20-17-15-12-10 Meters
NO Traps, >90% Efficient all bands		True vertical dipole, rated at 3KW+
15' 6" + base, NO Radials		Either vertical OR horizontal operation
4' sections, Free Standing, 14 Pounds		Quick assembly with one wrench
Updated with Tilt and X-base Photos

The Sigma-40XK^© is the same antenna used by Team Vertical on 40 meters to set World Records. As development continued, it was discovered that this excellent antenna could be enhanced for operation on more bands by using the 40 meter version as the core design. It comes with all components to place it on the 40-30-20-17-15-12-10 amateur bands. In actual practice, the Sigma-40XK^© can be placed on any frequency or band between about 5 MHZ and 30 MHz, making it an excellent choice for MARS and other services. It can also be operated horizontally as a dipole close to the ground for NVIS emergency communications. One alpha tester even put it on 75 meters!

N6BT used the Sigma-40XK^© during the CQP in early October, parking alongside the road in Tulare county. Running barefoot, 138 QSOs were made in only 2 hours including changing the antenna from 10 to 15 and then to 20 meters. About 1/3 of the contacts were on CW. Several unsolicited comments on the excellent signal strength were received, plus having VE1, VY1 and VK stations call in.

Frequency changes are simple. The T-bar lengths are set to the correct length for 20 through 10 meters, with pre-sets and pre-cut sections. 40 and 30 use the 20 meter T-bars, plus center loading coils are added at the feed point. Simple - and - it let's you get your hands on the antenna and learn what is happening! This is a great teaching tool for students.

Options include a tilt base and X-base to allow it to be free-standing for portable use.

Comes with balun and all parts - add your coax and you are on the air with the Sigma-40XK^© .

SIGMA-40XK^{^©}