![]() ![]() This antenna using this kind of transformer is a compromise.ĭO NOT EXPECT FOR HIGH EFFICIENCY FROM 3Mhz up to 30Mhz ONLY WITH A SINGLE 1:49 or 1:64 TRANSFORMER.įor better efficiency, the FUCHS Transformer is by far a better choice : The performance are acceptable below 20m (14Mhz)due to high losses from the transformer during transmit for frequencies above 14Mhz. I am using this antenna for almost 2 years and since i have limited space with my tiny garden. The total antenna lenght is about 23 meters, with one 20.4 meters long segment from the 1:49 transformer to the 110uh coil and about 2.2 meters long segment from the coil to the insulator. With this antenna the coverage is 80,40,20,15 and 10 meter band without any antenna tuner and the average SWR is below 1.2 on phone bands. At this point, there is a good idea to use CMCs for the power lines that supply the RF communication equipment (SMPS power supplies, linear power supplies etc.).My 1:49 Transformer is located in the Attic, just under a tile and obviously the wire is routed outside and hook on a 12 meters fiberglass pole in the garden. Potentially, the current mode currents can appear both at receive and transmit, so installing a CMC in the feedline path will significantly reduce the received noise and improves antenna's system overall performance. Because the CMC in discussion does not perform a a matching function, it can be named a 1:1 current balun. Because it forces the current at its output terminals to be balanced, the CMC are often named 'current baluns'. CMC exhibits high impedance to common mode currents/signals and does not affect (significanlty) the usefull differential signals transmitted through the feedline/coax. Often reffered to as a Feedline Current Isolator, a Choke Balun, a RF Choke, a 1:1 Guanella Balun (after its inventor) or a 1:1 Current Balun, the CMC is in essence a signal conversion/isolation device that suppresses (by its resistive behaviour) the current mode currents by forcing them to be balanced at its terminals (equal in magnitude and opposite in phase), even if the connected signal source or the output load are highly unbalanced. ANTW-01 | antenna wire winder | white, 3D.HF -VHF Antennas Antennas for HF/VHF/UHF & accesories, DYI KIts or assembled DIY kits or complete assembled antennas ready to be erected | antenna isolators | VHF/UHF whip antennas etc.VLF1WF VLF Pocket Receiver | 5 – 220KHz.Available as kit or enclosed, easy to use, simple designs and small form factor. Low Power Audio Amplifiers SEM-Low Power Audio Amplifiers Part of the SEM series (Simple Electronic Modules), Low Power Audio Amplifiers for receivers and transceivers or general purpose.You can find here various types and diameters of higg-quality winding wire. multifilar litz-wire for ferrite-rod antennas etc., silver plated multifilar wire for BAL-UN/UN-UN transformers winding etc. Coil Winding Wire SOLID CORE OR MULTI-CONDUCTOR WINDING WIRE Solid core silver-plated copper winding wire.Mouser™ – TME™ – DigiKey™ – RF Microwave ™ | from reliable sources | complete technical specs Trimmer capacitors Trimmer Capacitors – different values & shapes from known manufacturers and distributors in EU and US e.g.Varactor Diodes & Fast Switching RF application silicon diodes varicap / varactor | switching diodes | from reliable sources | technical specifications available.RF Integrated Circuits RF specific integrated circuits hard to find or common types, used as single needed part in a specific application, or assortment kits for certain known kits (uSDX, BITx, mcHF etc.).
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