More NBS2010 info from Copper Talk (typos included):
Here is the info as requested. The answers are direct from Shakespeare:-
Q. What is the differnce between the Camo Army Bigstick ABS16020 and the white NBS2010 other than colour?
A.Only difference beside color was an improvement in how we manufactured the "feedline" inside the lower section. This feedline was astep linear trasformer made of 1/16 wave length "Q" sections for matching the antenna across the bandwidth. We had some discontinuity problems on the 1600. So when we improved the design we changed the color
Q.What wave length is the antenna?
A.The antenna is a unique application of a 5/8 wave radiator. It is an off-center fed 5/8 wave coaxial sleeve antenna. We have a VHF version of it (136-174 MHz ) that is patented. We simply adapted the design to 27 MHz. The feed point of the antenna ie where the RF is acutually imparted to the antenna is at the top of the base stick so there is a 1/4 wave below and 3/8 wave above the feed point. The coaxial sleeve in the base section is why mo radials are needed and why it is not necesasary to cut the coax to a specific length.
Q.What about grounding the antenna?
A.Don't worry about "grounding the antenna"
But do use the inline static arrestor and keep it close to the ground with a good ground rod......this will keep the static buildup "charge under control and will "probably keep the lightening at bay too.
Specs
Technical Data -
ABS-1600 - Color Camo green
NBS2010 Color White
Power 4000 W PEP ICAS
Bandwidth 2.5 MHz (26-28.5 MHz)
Performance 5/8-wave
Wind rating 110 MPH
Length 21' nominal
Sections 3-UPS shippable
Mounting 2 U-bolts, supplied
ABS-1620 -
Color white
Power 1000 W PEP ICAS
Bandwidth 2.5 MHz (26-28.5 MHz)
Performance 1/2-wave
Wind rating 110 MPH
Length 18' nominal
Sections 2-UPS shippable
Electrical EQ Linear transformer matched 1/2-wave
Mounting 2 U-bolts supplied
