DudeTenna 100W+ End Fed Half Wave Kit with 75 ft Wire

Build Video - youtu.be/Y-ojVTQbszw

Build Instructions are now available at hamradiodude.com/Build_Instructions_v1.0.pdf (Build instructions may be slightly different than the build video due to changing parts / upgrades during the process between the video and Instructions)

This End Fed Half Wave Kit includes the following:

• One SO239 wire, 3D printed in ASA, a great material with UV Protection and higher warp temperatures.
• 75 Feet - of DX Wire UL - From the website: DX-WIRE UL (ultra light) is a very light antenna strand made of a

high-strength synthetic fiber known as Vectran® fiber . This Fiber is very similar to Kevlar as far as strength goes, with the attentional property of being more flexible than kevlar. The antenna wire contains tinned copper strand. The insulation
is made of weatherproof polyethylene (PE).
More information can be located here: dx-wire.de/dx-wire-antennendraehte-litzen/…

Prior kits did use Kevlar reinforced wire located on ebay. The issue was the cost. Having the two side by side, both are very comparable.

If you would like to see a chart comparing kevlar and vectran: chemiflex.com/wp-content/uploads/TB-1000-1…

• Appx 5.5 Feet - of 18 Gauge Magnet Wire . This should leave you plenty of extra.

1 - 100pf / 3kv capacitor
1 - SO239 Connector
1 - 1934-1079-ND Toroid . This is really about 3 times the mass as a T140-43.
1 - 1"x8" Cinch Elastic Cable to hold wire
2 - zip ties
1 set of Stainless Steel Hardware (#8 size)
1 - Dude Coil - Wrap this 10-12 turns, approximately 6ft from the toroid (on the Antenna wire). This helps tame/bring down 20/10m.

Additionally, this antenna wire is expensive. if you would like, you can go to the main page and purchase a EFHW kit without the Kevlar wire (no wire included). This will save you around $25 USD.

I prefer a 49:1 winding with a crossover at turn 8. This is ham radio, feel free to experiment.

Note: This EFHW kit is made for portable use and not intended to be permanently mounted outdoors.
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As of 05/25/2024, each kit now comes with two Stainless steel screws, nuts, and wingnuts and a total of 4 ring connectors. This gives you the option of having both your antenna and counterpoise wire connected to posts. I am able to do this by finding cheaper sources for the parts I am using (not cheaper parts).

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