9 1 balun
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Antennas : 40M : 40 meter Dipole Antennas- 40m loaded dipole
- This is an short dipole for 7 MHz. Total length of this dipole is just 10 meters, 33 feet. Missing lenght is balanced by a coil made of 49 turns of a 40mm diameter pvc pipe. The use of a choke balun is recommended, as always, to adapt the unbalanced coax cable to the balanced antenna, and to prevent RF feed back along the coax shield.
[ Hits: 194 | Votes: 4 | Rating: 8.75 ]
- BalUn for Delta-loop & Quad-loop antennas
- This Guide helps you to build the 1:2 BalUn 600 Watts DIY kit step by step. If a delta-loop or quad-loop antenna is powered with a coax cable from the transceiver it is necessary to use a 1:2 BalUn. This 1:2 BalUn uses a symmetrical 1:2 impedance transformer.
[ Hits: 286 | Votes: 1 | Rating: 9 ]
- Measuring HF Balun Performance
- If you thought you knew everything about balun performance characteristics, there is an important figure of merit you may have neglected
[ Hits: 258 | Votes: 0 | Rating: 0 ]
- 9:1 Balun and Unun
- Homebrew a 9:1 transformer and measurement for testing purposes with a miniVNA
[ Hits: 109 | Votes: 0 | Rating: 0 ]
- UniBalun: Lightweight Balun/UnUn PCB for QRP Radios (1:1, 1:4, 1:49)
- The UniBalun is a PCB for building a lightweight antenna transformer (Balun) or impedance converter (UnUn) for low power radios. By soldering jumpers and a toroid core, you can create a 1:1, 1:4 Balun or 1:49, 1:9 UnUn. The latest revision (1.2) includes improved pads and supports both BNC and SMA connectors. Build instructions are available for German speakers.
[ Hits: 62 | Votes: 1 | Rating: 1 ]
- Do not wind chokes on red toroids!
- I happened to stumble across some antenna projects showing common mode chokes 1:1 baluns made of some turns of coax wound on T200-2 iron powder toroids.
[ Hits: 187 | Votes: 0 | Rating: 0 ]
- T2FD Antenna - Terminated and twisted folded dipole
- T2FD is a 600-900 ohms folded dipole, terminated with resistor. Feed impedance is coupled with 50/600 ohms voltage balun. It is a wide band antenna with rather low SWR over the full designed frequency range: antenna tuner is seldom needed.
[ Hits: 487 | Votes: 0 | Rating: 0 ]
- Build your own Windom Antenna
- Building a Windom HF Antenna. A PDF file presentation about homebrewing a windom antenna for the HF bands with formulas for 40 and 80 meters bands and step by step guide on making a 4:1 balun to feed the antenna.
[ Hits: 768 | Votes: 2 | Rating: 10 ]
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