Aluma T-50HD 50-foot telescoping aluminum tower bracketed to the house about 20 feet above the base.
Antennas may be serviced from the roof when the tower is lowered (telescoped).
Vertical antenna at the top of the mast is a Comet GP-15 for 6 and 2 meter, and 70 centimeter bands.
3-element beam is a Hy-Gain LJ-153BA Long John monoband Yagi for 15 meters. A Cushcraft A4S is on hand for installation after trees are trimmed to provide room for a larger antenna.
Rotor is a Yaesu G-800S nested in the top of the tower. A Yaesu thrust bearing is mounted on the top plate above the rotor.
(more below)
Tower concrete base is 24" by 24" by 42" deep. Concrete was mixed using 60 pound bags of Sakrete. A rebar cage was fabricated and mounted in the hole before pouring the concrete.
Grey box near the bottom of the tower was fabricated using a Hubbell NEMA 4 box to house the surge protectors acquired from Array Solutions. (See photo below.)
(more below)
The Array Solution surge protectors are shown in the Hubbell NEMA 4 box. The topmost coaxial protector is for VHF/UHF, the three other coaxial protectors are for HF, and the bottom protector is for the rotor cable.
The glavanized-steel mounting plate supplied with the box was replaced with an aluminum plate fabricated from a piece of aluminum diamond-plate obtained from Home Depot. The diamond pattern observed in the photo are actually stress patterns in the aluminum. The diamond protrusions are on the back side of the plate.
The aluminum plate was used to be compatible with the aluminum mounting surfaces of the surge protectors. Anti-oxidant compound was used between all mounting surfaces.
Hubbell cord connectors are used to provide a water tight entrance and exit of the coaxial cables and rotor cable.
Two copper ground lugs are used for the #4 AWG bare copper ground wires that tie the surge protectors to the ground system at the base of the tower.
