HyEndFed 4 band antenna for 40, 20, 15, and 10 meter.
Max. Power : 1000 WATT PEP SSB, 200 WATT DIGITAL.
Length : 20 meter.
Enclosure : Polycarbonate IP67, 100% UV resistant.
SO239 Teflon Connector.
These VSWR measurements were taken in the open field at a height of 10 meters horizontally.
We use 2.1 meter of coax to a line isolator.
From the line isolator to the analyzer we used 10 meters of coax Ecoflex 10, with very little loss.
Coax loss Ecoflex 10 :
5 MHz 0,8 dB/100m
10 MHz 1,2 dB/100m
50 MHz 2,8 dB/100m
The antenna network box was positioned 10 meter above the ground.
The length of the antenna wire to the matching network is 40 meters and connected to an 12 meter mast.
The antenna was not grounded.
Used VSWR meter : RigExpert AA-600