Thingiverse
EFHW antenna
di IU1OPK
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End Fed Half Wave antenna is my favorite choice for portable operations.
It's a resonant antenna, easy to deploy and free of RF issues (that usually are found on similar random wires setup). Since I operate mostly with low power, around 30W maximum, I always used it without counterpoises and I never experienced issues.
The complete kit is designed for 10-20-40 m coverage and can be made with 10.1 m wire + 34uH coil + 1.85m additional wire.
The winder include also a second connection for GND if required/preferred.
This project is a complete kit designed to be 3d printed easily, and includes:
Winder base, designed to seat toroids of 140 size (ID 23 mm, OD 23 mm). In my 10-20-40m version I use a FT-140-43 toroid.
Winder cover (4x M3 screws required)
Insulator, designed for 23AWG wires commonly used for portable operations.
Loading coil support, useful if you need a shortened version able to cover the 40m band. With 32AWG enameled wire it has an inductance of around 34uH
It's a resonant antenna, easy to deploy and free of RF issues (that usually are found on similar random wires setup). Since I operate mostly with low power, around 30W maximum, I always used it without counterpoises and I never experienced issues.
The complete kit is designed for 10-20-40 m coverage and can be made with 10.1 m wire + 34uH coil + 1.85m additional wire.
The winder include also a second connection for GND if required/preferred.
This project is a complete kit designed to be 3d printed easily, and includes:
Winder base, designed to seat toroids of 140 size (ID 23 mm, OD 23 mm). In my 10-20-40m version I use a FT-140-43 toroid.
Winder cover (4x M3 screws required)
Insulator, designed for 23AWG wires commonly used for portable operations.
Loading coil support, useful if you need a shortened version able to cover the 40m band. With 32AWG enameled wire it has an inductance of around 34uH
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