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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,
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 hand made EFHW Antenna with a built in 49:1 Transformer. This is incredible for POTA, SOTA and other portable/field operations. Setup in any end fed configuration you like.
22 lut 2021 · The 49:1 Unun Impedance Transformer secured in electrical junction box with all proper connections assembled. 100pF 15kVDC capacitor soldered at center conductor of SO239 connector and twisted ground wires.
Step 4: Wind the ~49:1 unun toroidal transformer. NOTE: For the 20w kit, nest the smaller toroid in the center of the larger toroid and wind them as if they are one toroid for the following steps. Uncoil the magnet wire. Begin winding the magnet wire as shown below, making three turns through the toroid.
This is a 49:1 Transformer for end-fed half wave antennas. Frequency 80,40,20,15 and 10m with 133 feet of wire. Or 40,20,15,10 with 67 feet of wire. Power handling is 100 watts PEP
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.
