This is the Kit version for user wishing to build their own 40m dipole for installation on a HEAVY DUTY Version of the Spiderbeam Yagi. (Balun not included.)
This 40m dipole extends the coverage of most Spiderbeam Yagi Antennas to include the 40m band. It may be added on to most existing Spiderbeam Yagi antennas, or ordered together with a new antenna. The dipole is rotated 90 degrees to the other wire elements.
Both sides of the boom are extended by one additional fiberglass tube, increasing the turning radius from 5 meters (16 ft.) to 6 meters (19.2 ft.).
Each end of the dipole is capacity-loaded using two thin wires tied back to the side spreaders.
The dipole may be connected to the Spiderbeam’s existing balun and used with the same feedline as the other bands, or used with a separate feedline and balun.
When using only one balun, the forward gain and front-to-back ratio for the higher bands are not affected, but the front-to-side ratio is reduced, especially on 15m.
The (optional) balun is not included with the dipole and must be ordered separately when 2-balun configuration is desired. The balun is available either in kit form or pre-assembled and ready to install.
Feel free to download the construction-guide here and the parts list with some technical data and SWR curves here.
NOTE: Not compatible with the WARC Spiderbeam Yagis.