Questions tagged [efhw]
End-Fed Half Wave is a type of antenna.
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60 views
Troubleshooting the MFJ 1982 EFHW
I am a beginner with not much experience in HF. My shack consists of a Xiegu G90 connected with 20ft of RG-8x to an MFJ 1982 end fed half wave antenna. There is a small coil of coax next to the ...
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How do you calculate the number of turns for a common mode choke?
I want to build a common mode choke for my end-fed wire antenna, using turns of coax through an FT140 or FT240 ferrite. I can find various finished products for sale, but I want to make my own. I ...
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2answers
164 views
horizontal EFHW antenna attached to gutter
I'm brainstorming methods of mounting an EFHW. Unfortunately, I have no trees, so I'm considering a horizontal gutter mount which would afford me about 70 feet. Is this workable or should I consider a ...
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3answers
148 views
Loop a long wire antenna or EFHW
For a typical EFHW antenna, let's say we are in a very space-restricted environment, says a hotel room.
I am thinking of the idea loop around the wire around the room, maybe even many loops.
This is ...
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2answers
148 views
Multi-wire EFHW?
I have an EARCHI EFHW (40:1 unun)antenna that I used quite successfully until it fell from a tree. I wasn't able to get it back up, so ran it along my wooden fence temporarily. Unfortunately, the ...
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1answer
110 views
How Much Does the Radiation Pattern of an “EFHW” Antenna System Vary Across its Bands?
This NEC4.2 analysis shows one example of such variation.
