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The Needle, narrow vertical loop antenna plan
- Thread starter xm49north7
- Start date
I have tested 2 coil baluns with this antenna, a 4:1 nd a 6:1 , I did not get great results best match has been with the 1/2 wave times velocity , coax balun. Getting nice low swr on my 2 diamonds at around 1.3 to 1, pretty flat across all 40 channels. I have one up vertical and one up horizontal, modeled gain horizontal is 8.03 dbi at 21 feet to the bottom wire.
No that would work for a quad at 125 ohm, this is around 270 ohms, the balun is very simple to make just coil 143 inches of coax, on a 6 inch form and wire as shown in the diagram, Made mine in 10 mins. Have swr 1.3 across all 40 channels, on both of my diamonds, one vertical one horizontal.
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