For a long time I wanted a broadband dipole. Most of the broadband dipole antennas of the T2FD and T3FD variations are marketed for commercial users like the military, governmental agency and NGOs and is therefore in a price rang not favorable for a ham. Manufacturers of commercial antennas are companies like Bushcomm, Codan Communication and Barkers&Wiliamson. There are also other manufacturers but most of them are in the same price rang or have export restriction when it is manufactured in the US.
The US export restrictions are based on that some equipment can be considered as military equipment. But I think that most of the time it is the manufacturers that don’t want to use the sorceress and time to check if it is actually covered by the US legislation of materials that can be considered as military equipment.
To save money and don’t have the hassle of dealing with Norwegian or any other country customs legislation I decided to go ahead to build one.After searching the internet I found some building-plans at the HF link website. Here i found some information about a PDF from LB Cebik W4RNL (sk) Notes_on_Wide_Band_Multi_Wire_Folded_Dipoles_by_LB_Cebik_W4RNL.
The W4RNL PDF contains all the information I need to build wide-band dipole antenna. There are variations of the wide-band dipole, but the most common variations are the T2FD and T3FD. After reading the PDF form start to end I decided to build the T3FD because this have a flatter SWR along the whole frequency range.
Description of the antenna.
The antenna is described in lengths of 89,14′ and 90′. Because I bought a 100 m length of 2 mm stainless steel wire I will make the antenna a bit longer and cut it down a bit to tune for lowest SWR.
The resistor is 800 ohm because this will give a flatter and lower SWR than when using a 450 ohm resistor.
Balun will be a 10:1 balun made with 43 material binocular core.
The spacers will be fiberglass fence-poles used on electric fences.
To build the antenna the following parts will be required.
- Terminating resistor 800 ohm.
- Ferrite material for the balun.
- Antenna wire stainless.
- Fiber glass spreaders.
- Isolators.
- Housing for resistor and balun.
- Fasteners and crimps.
geggi73a 
2/16/2022- I built a 3TFD / 120 ft @ lowest Fq: 2.4MHZ/ element spacing 16inch / 1 inch wide electric fence poly tape with 7 AL strands / 620 Ohm -350 W resister / Ant. up 30 & 40 Ft. / 600 Ohm Ladder Line to a 600>50 Ohm Balun……..Covers 160M > 6 M with the FT-950 internal ant. tuner @ 100 watts 1:1 / Good job !
I
How is the flatness of the SWR over the frequency range?