Force-12 (USA)manufactures multiband beams and also verticals.
Force-12 beams don't use traps but consist of several monoband yagis on one boom. Due to the patended "open sleeve" feeding system usually only one feed line is required. No traps means no practical power limit: unless otherwise noted the beams have a max. power rating of 5kW SSB.
All antennas come pre-assembled, the element supports are already attached to the boom. Each tube set for each element is bundled and marked. The elements are riveted for extremely solid and long time endurance. The boom mounts come in two parts and are very easy to assemble, so you don't need a third hand to mount the antenna.
Each antenna is assembled at the factory and disassembled again for shipment. Due to the small shipping size and low weight, Force-12 antennas are often used at major DX-peditions. Force-12 does manufacture more than 100 models, we show the most often used ones.
Informations about Force-12 vertical Sigma-5 here.
Multiband yagis for 10 - 20 or 10 - 40 meter bands. The antennas are designed for the traditional bands, but also have a little gain on WRC bands (tuner required). Withstands max. 128 km/h wind speed, models for higher windloads are available on request.
5 band antenna 20-17-15-12-10, (17/12m requires Tuner) with one feedline, very compact due to shortened 20m elements by "linear loading" . Turning radius only 4,5m. This model is designed for up to 160 km/h wind speed. Shipping size only 1.2m.
The C-4SS is similiar to a C-3SS plus an additional 40m element with linear loading. So this antenna is a very compact multiband beam für 6 bands (10-40m, expect 30m). For thechnical data please see the table below.
The C-4S is a C-3 with a 40m dipole added. This 40m dipole is shortened by "linear loading" and has a length of only 9m. This antenna requires two feedlines.
The C-4XL is constructed out of a C-3S and a EF-240S 40m 2 elelment antenna, resulting on 9 elements overall. The 40m elements are shortened by linear loading, only 9m long. This antenna requires two feed lines, one for 40m, one for 20-10m.
Large beams from 10 - 40m incl. WARC bands. Usually one common feedline, but separate feeds are possible. Designed for max. 160 km/h wind speed.
A real 5 band antenna 10-12-15-17-20m, with 10 elements (2 full size elements per band!). Only 6m boom length, one feed line. Max. load up to 5 kW, weight 28kg, max. 160 km/h wind speed.
The "best" three band antenna: consists of three wide spaced monoband yagis on one boom, a total of 14 elements. 3 elem. on 20m, 4 elem. on 15m and 7 elem. on 10m. One common feed line, but three separate feeds are also possible (e.g. for multi-op contests, using band filters).
Triband beam, 10-15-20m, a slightly smaller version of the C-31XR: 11 elements, 3 on 20m, 3 on 15m and 5 on 10m. Like C-31XR for 160 km/h max. wind speed.
| No. Elements | Max. Element- length | Gain @25m a.g.(dBi) | Gain free space (dBD) | Boom- length (m) | Turn- radius (m) | Weight (Kg) | Wind speed (km/h) | Antenna- surface (m2) | Order No | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 | 12 | 15 | 17 | 20 | 40 | 10 | 12 | 15 | 17 | 20 | 40 | |||||||||
| C-3SS | 6 | 8 | 12.5 | 9.5 | 12.6 | 10.1 | 12.2 | - | 4.4 | 1.6 | 4.7 | 1.9 | 4.1 | - | 3.6 | 4.1 | 14 | 160 | 0.45 | 11750.SS |
| C-4SS | 7 | 11.3 | 12.5 | 9.5 | 12.6 | 10.1 | 12.2 | 2 | 4.4 | 1.6 | 4.7 | 1.9 | 4.1 | 0 | 3.6 | 5.6 | 20 | 128 | 0.55 | 11755.SS |
| C-4S | 8 |
12 | 12.5 | 9.7 | 12.7 | 10.1 | 12.5 | 7.8 | 4.4 | 1.8 | 4.8 | 2.5 | 4.5 | 0 | 3.6 | 6 | 17 | 128 | 0.6 | 11755.S |
| C-4XL | 9 | 9 | 12.5 | 10.1 | 12.8 | 10.3 | 12.6 | 11.9 | 4.4 | 2.1 | 4.8 | 2.3 | 4.6 | 2.3 | 9 | 7.25 | 33 | 128 | 0.76 | 11755.XL |
| XR-5 | 10 |
12 | 12.5 | 12.6 | 12.8 | 12.6 | 12.6 | - | 4.4 | 4.5 | 4.8 | 4.6 | 4.6 | - | 5.4 | 6.2 | 28 | 160 | 0.85 | 11760 |
| C-19XR | 11 |
12 | 14.1 | - | 13.1 | - | 13.3 | - | 5.9 | - | 5.0 | - | 5.2 | - | 5.8 | 6.2 | 29 | 160 | 0.91 | 11765 |
| C-31XR | 14 | 12 | 15.6 | - | 14.3 | - | 14.0 | - | 7.4 | - | 6.3 | - | 6.0 | - | 9.4 | 7.3 | 42 | 160 | 1.1 | 11770 |
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