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An 80-10 end-fed half-wave antenna can be a very good performing part of an HF station. But its performance depends heavily on a well-designed and carefully constructed 49:1 unun, which matches the long wire impedance to within tuning range of operation. But the perfor-mance of an end-fed antenna is also very dependent on height above ground.
30 lip 2024 · Our dipole calculator is a simple tool that allows you to compute the length of a simple antenna — it'll also provide you with the value of the wavelength and the adjustment factor [k].
14 sie 2024 · 5/8 Wave Antenna Length Calculator; Helical Antenna Calculator; Antenna Loop Calculator; Efhw Antenna Formula. The following formula is used to calculate the length of an End-Fed Half-Wave (EFHW) antenna.
Drill a 3/16˝ hole in the unun top, about ¾˝ from the back of the enclosure. Install a flat washer onto a 3/16˝ eyebolt, and slip the eyebolt assembly through the hole.
How to Build a UN-UN. Direction: Fold the 3 metres of copper insulated wire in two. Mark the wires’ end so to recognize them when the windings is done. Wind 13 to 19 turns of the bifilar wire ( more turns better response to lower band ).
Antenna Length Calculator. 1. What type of antenna do you want to build? Dipole. Fan Dipole. Inverted Vee. Off Center Fed Dipole. Vertical. 2. What frequency will you be operating on? Frequency: MHz. Meters Feet. 3. Here's your antenna...
This page contains various javascript based calculators for electronics. Slim Jim and J-Pole antenna calculator – Build a cactus for any frequency. 1/4 Wave Ground Plane antenna calculator – Build a simple quarter wave with radials.
