Search results
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 amateur bands from 80 meters thru 10 meters with a 135 foot length of wire and a short connection to ground.
31 gru 2022 · wyprowadzenie odczepów uzwojenia wtórnego dla wartości transformacji impedancji: 36:1, 49:1 i 64:1 (punktowe pokrycie szacowanego zakresu dopasowania), rozdzielenie uzwojeń pierwotnego i wtórnego w obszarze masy/uziemienia umożliwiając tworzenie dowolnej konfiguracji przyszłej anteny,
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.
17 cze 2023 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...
27 mar 2024 · Since we have not seen a good, rigorous measurement of any 49:1 UnUn embedded in a 50-ohm system, I constructed a couple to accomplish that measurement by connecting them in series: 50-ohms to 2.7 kΩ and back to 50-ohms.
The 49:1 impedance transformer ( or 64:1 ) will help you bring down the high impedance of your resonant EFHW antenna to almost 50 Ohm. Let’s have a look at a few details on how to build a 49:1, or a 64:1 impedance transformer.
22 lut 2021 · The following is a list of materials required to make a 49:1 unun impedance transformer for an end-fed half wave antenna. You will also need a half-wavelength length of wire (14 or 12 gauge typically) in order to construct an antenna radiator for whichever ham band you choose.
