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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,
20 lip 2021 · 1) More primary turns and primary inductance improve the transformer efficiency and low end performance. 2) Winding capacitance and leakage inductance, especially present as you increase the number of turns, limit the high frequency performance.
4 sty 2024 · Lets build a QRP 49:1 Antenna! This is a full walk through in real time so follow along and build your own!Check out the kits I have available at Tufteln.com...
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.
This is a unun ( unbalanced to unbalanced ) transmission line transformer designed to match 2500Ω to 50Ω . It has a constant impedance transformation ratio of 49:1 from 1.81 MHz to 30MHz. Technical specification : Type : 49:1 Unun Frequency : 1.81 MHz – 30MHz
7 lut 2024 · Along my journey on understanding radio, electronics, and in particular, the magic of baluns, ununs, and other transformers, I came across this helpful video on how to analyze a 49:1 unun with a NanoVNA. I replicated it with the the “Alleyway Antenna” transformer.
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.
