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End-Fed Horizontal Wires (EFHW) cover multiple bands with-out traps, stubs, or resonators. End-fed radiators have the unique quality of resonating on the 1/2-wave fundamental frequency plus odd/even harmonics above! Broad-band matching transformer at feed point lets the entire HF spectrum be yours!
The heart and soul of the EFHW antenna system is the impedance matching transformer. Its task is to match the incoming feedline impedance of 50 ohms to the 2500 ohms impedance present at the end of the dipole. The transformer can be wound in a variety of ways, depending on the desired results. The most popular design currently is a 49:1 ratio.
For those that enjoy the LNR and Hy Endfed antennas, but want to run more power, Balun Designs now offers an excellent alternative. Built with the same craftsmanship as all our other units, this new model will allow you to either replace your current matching unit or construct a new higher power end fed half wave antenna.
End-Fed Horizontal Wire antennas (or EFHWs) cover multiple bands without traps, stubs, or resonators. End-fed wires resonate on their 1/2-wave fundamental frequency plus all odd and even harmonics above. Free Shipping. MFJ-1984MP come with 66 feet of wire and cover 40, 30, 20,15, and 10 meters.
18 wrz 2021 · With an unbalanced end-fed antenna like the EFHW the power amplifier/output network essentially “pushes” current into the antenna by “pulling” an equal current from the ground system, each cycle.
3 wrz 2017 · I have compared EFHW-8010 (which looks very similar to MFJ) versus full size inverted V wire dipoles (all antennas had their top 14 m off the ground) on 80/40/30/20 m with a WSPRlite beacon. Results were quite interesting: similar on 80 m, slightly lower on 40 & 30 m, rather poor on 20 m.
22 lut 2021 · MFJ-1984LP summary. No antenna is perfect and each time I start a product review, I keep a list of pros and cons. Here’s my list for this EFHW antenna: Pros: Very affordable at $49.95; Effective: results so far have been excellent; EFHW is a proven field antenna design and resonant on several bands; No coil on the radiator to snag in trees ...
