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JK801 Rotatable Dipole for 80M
Price : US$2,699.00 **
The JK801 is a motorized inductor coil loaded as well as end capactively loaded rotatable dipole, with a small footprint, giving great performance on 80M.
This antenna is made for the Ham operator that is looking for a compact dipole antenna to work on 80M. The best performance of this dipole is achieved at approx 130Ft or higher.
It is made with very high quality materials and the
best in its class in the market in terms of mechanical construction and electrical performance.
This Dipole has a good 40KHz bandwidth for each setting on the motorized inductor. The motorized inductor gives this dipole a full band coverage of 1:1 swr on 80M. This is achieved with a screw driver antenna type controller in the radio shack.
Approx wt. = 77 lbs
Wind Area "C" = 3.8 Sq Ft
"G" = 6.84 Sq Ft
Projected Area = 5.7 Sq Ft
Max Wind Speed = 100 Mph
Max Turning Radius = 27.5 Ft
Feedpoint = 50-Ohm Direct
Power = 5KW Avg or Balun restricted
Average Gain = 1.87 dbi (Freespace)
Average Gain = 7.64 dbi (130Ft @28 deg) Avg. ground
Average Gain = 7.97 dbi (155Ft @23 deg) Avg. ground
SWR Bandwidth 2:1 = 40 KHz (each setting)
Total Element length = 55 ft
1:1 SWR full band coverage with each setting on motorized inductor
*** Gain shown below is 130FT above Average/Flat ground using NEC4 ***
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*** Gain shown below is 155FT above Average/Flat ground ***
Parts Not Supplied: Control Cable & Screwdriver type antenna controller
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