Make sure that you get the correct version without Amplifier!
Additional Material used:
1 Rod of Aluminum 4mm Diameter and 1000mmm Length
8 Hex Spacers M4x20mm (like the Ones used for mounting PCB's)
Coaxial Cable with 50Ohms (I used 3m of RG58 with a BNC Connector on one End)
Instructions
1. After unpacking remove the provided white Coaxial Cable completely. (It is a 75 Ohm Type for TV)
2. Replace the Cable by a 50 Ohm Type (RG58 or better, make sure it will fit through the beam and is flexible enough for the bending during Rotations later on)
3. Use Aluminum Rods of 4mm Diameter
4. Cut 4 Pieces of 100mm Length
5. Cut 2 Pieces of 110 mm Length
6. Cut 2 Pieces of 120 mm Length
6. Put M4x10 Threads on one End of each prepared Rod
7. Put M4x10 Threads on the 8 longest Rods of the Antenna (4 Rods on each Beam)
8. Install 8 M4x20 hex Spacers on the prepared Rods of the Antenna
9. Now install two 120mm Rods on the longest Pair of Rods of the Antenna and tighten them (they will be used as Reflector)
10. Install the two 110mm Rods on the next shorter Pair of Rods of the Antenna (they act as Drive)
11. Install the four 100mm Rods on the remaining 2 Pairs with the Spacers on them (they will be used as Directors)
Done!
Verification of Antenna
Mount the Antenna to a Mast or rotary Drive as needed and test the Antenna on 145MHz for 2m Wavelength and 432MHz for 70cm Wavelength.
Check the SWR with low Power first!
SWR should be very low between 1.0 to <1.1 if everything is ok.
When SWR is correct, then you can apply full Power.
I use with my ICOM IC-706MKIIG up to 50Watts on 2m and 20Watts on 70cm. (max Power from the Transceiver)
Advise for outdoor use!
If you plan to install the Antenna outdoor, it is highly recommended to seal the Beams and electrical Connections with some Silicone!
Last Updated 03/08/2008