This is remix from http://www.thingiverse.com/thing:1725339
The idea is make 3 or 4 band lightweight portable vertical antenna.
The dimensions and simulations and measurements coming soon.
Work is in progress.
The holder is designed in Openscad and use cable ties.
CHANGE LOG
#####12.1.2017
- Added simulation of 40,20,30m version with base loading coil.
#####13.1.2017
- Added radial end insulator in STL and OpenSCAD
#####23.1.2017
- Added reduction for BNC connector and cover when connector is not used
#####26.1.2017
#####07.2.2017
- Coil inductance measurement
#####10.2.2017
- Improved coil holder for better fit of cable ties
#####12.2.2017
- Bottom fixing for fibre glass pole - 6m Decathon travel pole or cheap 6m pole Agepoch from Aliexpress.
- pole guying part for top of pole - 5mm and 10mm diameter
#####26.2.2017
- Field test of 40/30/20m version with VNA, 4.1 m lenght of vertical element, 5.25m radials
Antenna is really narrow on 40m as expected.
- Plots from VNA.
#####24.4.2017
-wiring diagram
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