ALPHA ANTENNA HexTenna User Guide
- June 3, 2024
- ALPHA ANTENNA
Table of Contents
Model – HexTenna™
User Guide, Version 3.2, July 23, 2019
Operation
The HexTenna™ by Alpha Antenna® is a portable full-sized legal limit antenna, which is deployable as a UHF/VHF/HF Vertical/Dipole antenna or a 2-20 meter Yagi if purchased. Please feel free to email us atalphaantenna@gmail.com if you have any questions.
Excess RF Exposure Warning
In the United States, the Federal Communications Commission has established guidelines for human exposure to Radio Frequency (RF) electromagnetic fields. The commission’s requirements are detailed in parts 1 & 2 of the FCC’s rules and regulations {47 CFR, 1.1307(b), 1.1310, 22.1091, 2.1093}. It is the responsibility of the owner/operator of this device to follow all applicable warnings and precautions regarding human exposure to RF fields. Additional references: http://www.arrl.org/rf- exposure
Post Assembly Instructions
Step
|
Hex Tenna Assembly
---|---
1
| Attach your coax to the built in SO-239 on the Alpha Match hub.
2
| Use a measuring tape to adjust the length of the whip(s) to closely match the lengths on the charts below.
3
| Make any final adjustments to the whip(s) until the lowest SWR is achieved.
Tune by adjusting the following lengths on each element.
Yagi and Dipole element lengths
Approximate element lengths of each Yagi & Dipole element
Band| Yagi ‘Driven Element’ and ‘Dipole Element’| Yagi ‘Reflector
Elements’
40| 16’ 9” (5.1054 Meters) & install the clip-on wire element | Not supported
30| 10’ 4” (3.1496 Meters) & install the clip-on wire element | Not supported
20| 16 feet 11 1/2 inches (5.1689M)| 17 feet 3/4 inch (5.2M)
17| 13 feet 3/4 inch (3.98145M)| 13 feet 5 1/2 inches (4.1M)
15| 10 feet 11 1/2 inches (3.3401M)| 11 feet 7 3/4 inches (3.55M)
12| 9 feet 6 inches (2.8956M)| 9 feet 10 1/4 inches (3M)
10| 8 feet 3 1/2 inches (2.5273M)| 8 feet 6 1/3 inches (2.6M)
6| 4 feet 8 inches (1.1684M)| 5 feet 1 inch (1.55M)
2| 4 feet 7 1/2 inches (1.4097M)| 4 feet 9 inches (1.45M
- As a Yagi, Alpha Antenna does not support 30 or 40 meters on the HexTenna™. When deployed as a Dipole, tuning on 30/40 meters is achieved on the Dipole after the wire elements are installed, by equally retracting each element till resonance is achieved. The wire add-on elements are attached to the tip of each telescopic
element with the clips, and deployed to form an M-Shaped dipole. The wire element can be held straight by pushing the included stake into the ground or removing the stake and tying off either end with the included green insulators to a tree or other support. IMPORANT – Do not allow wire elements to lay on the ground.
Vertical/Counterpoise element lengths
Vertical Element & Counterpoise approximate lengths (Roll out the single counterpoise for minimum SWR)
Band| Approximate length of Vertical Element| Vertical Element Approximate
Length of 4 user provided Counterpoise Elements| Lengths of the Vertical
Element & Counterpoise may vary based upon variables unique to the user site
and/or equipment. Enter installation specific notes here.
20| 13 feet 2 inches| 18 feet 2 inches (5.5372M)|
17| 9 feet 8 inches| 14 feet 2 3/8 inches (4.32562M)|
15| 8 feet 7 3/4 inches| 12 feet 1 1/2 inches (3.7M)|
12| 7 feet 1 inches| 10 feet 4 inches (3.15M)|
10| 6 feet| 9 feet (2.74M)|
Approximate length of Vertical Element with No Counterpoise
440 Mhz| 2 feet 2 inches (0.66M)| No counterpoise recommended
220 MHz| 3 feet 4 3/4 inches (1.04M)| No counterpoise recommended