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This project assembles a 49:1 ferrite-core (“FT”) type #43 transformer that matches 50 ohm input to 2500 ohm end fed antenna. It is optimized for 3.5/7/10/14 MHz but will work reasonably well on all
31 gru 2022 · Tak powstałe odczepy (po usunięciu emalii z miejsca gięcia) służą dostępowi, z zewnątrz obudowy, do wybranych wartości transformacji impedancji (36:1 i 49:1). Drut powracający z odczepu w kierunku do toroidu jest zabezpieczany opaskami winylowymi i następnie nawijany dalej jak poprzednio.
4 lip 2023 · Live testing of this antenna here: https://www.youtube.com/live/NGsQ1ZRbYKI?feature=share
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.
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.
20 lip 2024 · W skład zestawu wchodzi:Balun UnUn 49:1 na pasma KF transformator antenowy o mocy max. 500W SSB dedykowany do anten o impedancji 2540 Ohm np.
I recently replaced the 20W-rated 49:1 unun for my EFHW with a new 200W-rated 49:1 unit, and the new SWR graph is completely different. Does this mean there’s a problem somewhere, or why is it so different?
