Add-On 30m Dipole Option (1000 W.)
The capacity-hat end-loading wires slide in between the outer two existing elements of the 3-Band or 5 Band Spiderbeam Yagi:
This option is similar to the 40m Add-On Dipole, and may be attached with the existing Balun or with a 2nd, dedicated Balun and feedline.
Although a common BALUN and Single Feedline is cheaper and easier to install, it has a disadvantage: The Front-to-Side ratio of the antenna is degraded on the higher bands, especially on 10m. However, the Front-to-Back ratio on the higher bands is not affected.
Dual-BALUN, Dual Feedline: When the 30m add-on dipole is fed through its own dedicated BALUN and feedline, the Front-to-Side ratio on the higher bands is not affected.
NOTE: When using the add-on 30m dipole and the add-on 40m dipole together with the Spiderbeam, you MUST use a separate BALUN and feedline for the two dipoles. Best case, mount the BALUN connecting both dipoles about 1 meter (3.3 ft.) above the BALUN connecting the higher band driven elements. This enables greater separation between the wires of the two dipoles.
STEP-1: Connect each dipole half to the side screws of the BALUN. (either the common BALUN, or the dipole's dedicated BALUN)
STEP-2: Extend each dipole half as far as it will go and fasten to the boom with a stainless steel hose clamp.
STEP-3: The End-Loading Wires are extended with PVDF Monofil line and fasten to the ends of the side spreaders, like all other elements of the Yagi are fastened.
- Normally NONE!