Specifications:
Overall height when fully extended - 46 feet (height of vertical radiating element)
Diameters of vertical radiating element tubing- First 18' is 2" dia. x .125" wall (1/8") 1.75" dia. x 24" long x .125" wall coupler Second section is 1.5" dia. x .058" wall 12' Third section is 1.375" dia. x .058" wall 11' Fourth section is 1.25" dia. x .058" wall 5'
Fourth section can be removed or set to any length in order to achieve height of 41-46' Uses Stainless Steel hose clamps to compress around sections and to fix couplers between sections. Please Note: The actual sections are 6 feet coupled with the next smaller size tubing, the coupler is 18" long. In other words the antenna is shipped in 6 foot lengths.
Tilt base dimensions- Back plate- 5/8" thick x 6" wide x 12" high aluminum Tilt Arm- 5/8" thick x 3" wide x 18" high aluminum Black CNC machined Acetal (Delrin) UV stablized clamps 1 1/2" wide x 3 1/8" high x 4" wide 3/8"dia. Grade 5 bolts and nylon insert lock nuts used through clamps for ultra ridgid assembly. Requires a nominal 2" dia. x .25" wall pipe x 5' long set in concrete for mounting to the base. Safety bolts (1/2" dia.) pass through tilt arm to draw arm into back plate. Tilt Arm pivot bolt-1/2" dia.
Antenna Frequency range- 80-30 meters fully extended to 46' 20 meters when extended to 41' (even better results on 20 will be obtained when next lower section also removed making overall height 35')
Description:
Very ruggedly constructed non-resonant vertical antenna for the lower amateur radio bands (except 160 meters as it is too physically short). This is a low angle radiator which will provide excellent DX performance. Lower section consists of 18 feet of 2" dia. x 1/8" wall heavy tubing for a stiff and rigid base section and lighter tubing on the upper sections to reduce wind load and weight. Antenna is pretty much self supporting but we recommend guying (guying clamp designed just for that purpose is also available) for very high wind environments . The rugged radiating element sits on similiarly designed tilt over base. This base provides quick and smooth raising and lowering and has features like a stop block to make lining up the holes in the tilt arm very easy without having to line them up by eye. The base is equipped with 3 U bolts and our own machined V saddle clamps so that if a mounting pipe of slightly greater or less than 2" dia. is used the clamps will still exert all their force. You can use a smaller dia. pipe but we do not recommend smaller than 2". We do not recommend using on 160 meters as it is too phyically short to be efficient and most of your power will be radiated as heat. Furthermore it is too long for the higher bands 17-10 meters and radiation angle will be very high.
About feeding this type of antenna: A non-resonant antenna as this one should be fed using a remote antenna tuning unit (ATU) at the base of the antenna. The ATU will tune out any reactance at the feed point and present a 50 ohm impedance to the coax (also 50 ohm).
Radials are required