4 to 1 balun

4 to 1 balun

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• Lightweight 144 MHz Yagi antenna - A Lightweight 2m Yagi for SOTA. The boom is 20mm PVC electrical conduit and the elements are 2.4mm aluminium TIG welding rod. The antenna is carried as a single length of conduit with the elements stowed inside the boom, sealing them in with a bung. The driven element is connected directly to 50 Ohm coax with a BN-43-202 balun core to decouple the coax shield.
  [ Hits: 179 | Votes: 0 | Rating: 0 ]

• HomeBrew 1:1 4:1 9:1 Baluns - Circuit diagrams to homebrew different baluns by vk2awx
  [ Hits: 2331 | Votes: 14 | Rating: 3.65 ]
• How build a 1:40 Balun - Italian page about a home made a 1 to 40 balun with pictures and measurements on HF bands.
  [ Hits: 1317 | Votes: 2 | Rating: 8 ]
• Build your own HF balun - A balun is a MUST for dipoles or similar antennas when they are feed with coaxial cables. Many hams connect the center conductor of the coaxial cable to one side of the dipole, and the shield to the other. Wrong!
  [ Hits: 1639 | Votes: 5 | Rating: 5 ]
• When and Where to Use Baluns - Baluns are usually used by Hams to feed dipole antennas with 50 ohm coax and to transpose from ladder line feeding a multi-band antenna to the unbalanced input of an antenna tuner.
  [ Hits: 1522 | Votes: 9 | Rating: 7 ]
• 50:450 Ohm (9:1) Balun for vertical antennas - A page describing how to home made a custom 9:1 balun for a common portable wire antenna. The author suggest to use 4C65 or FT140-61 toroids instead of the common Amidon T200-2
  [ Hits: 516 | Votes: 11 | Rating: 6.72 ]
• Build your own HF balun - A balun is a MUST for dipoles or similar antennas when they are feed with coaxial cable. From the RF point of view, the shield can be modeled as two conductors, the internal shield (the real shield, this is, ground) and the external shield, who is really far to be ground. In this way, your dipole has 3 arms, the two from the dipole and the coaxial cable shield (external face)
  [ Hits: 248 | Votes: 1 | Rating: 10 ]
• 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 ]

• How to build a Coax Balun 1:4 and 1:1 - An air-wound balun made with coaxial cable can not become saturated because no powder iron or ferrite core is present. In this article author explains and compare coax baluns to ferrite baluns with comparison tables and detailed pictures
  [ Hits: 577 | Votes: 8 | Rating: 8.63 ]

• BALUN 4:1 by IQ9BH - A detailed homebrewing project of a 4 to 1 balun in italian
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• Balun 4:1 - 4:1 Ruthroff voltage balun design using a T200-2 Toroid core
  [ Hits: 1285 | Votes: 3 | Rating: 6 ]
• 4 to 1 Balun - 4:1 FB 3061 ROD x 2 balun can handle 125 Watts
  [ Hits: 915 | Votes: 6 | Rating: 6.5 ]

• DIY CobWebb Antenna - A DIY guide to build your own compact multiband HF antenna based on the G3TXQ version using a 1:4 balun. This article includes the full part list and instructions to assembly, including the center plate.
  [ Hits: 1005 | Votes: 6 | Rating: 7.5 ]

• End Fed Antenna with a 1:64 Matching Network - In this experiment the autor is going to explore the use of a 1:64 matching network on the End Fed Long Wire Antenna. Experiment will consist in build a 80-40-20-15-10 meter End Fed Long Wire Antenna with a 1:64 matching network from the documentation available on the internet
  [ Hits: 872 | Votes: 15 | Rating: 6.73 ]

• HF Multiband end fed antennas - A multiband end-fed antenna that cover 3.5 to 30 Mhz using a 1:64 Balun based on a FT240-43 core
  [ Hits: 3725 | Votes: 6 | Rating: 4.67 ]

• The Easy Way Antenna Systems - This document is a must read for anyone considering building a good low cost HF multi-band antenna system. The author combine in this document four important ingredients to produce simple but effective antenna system, like antennas of non resonant length, line attenuation, the transmatch and the balun
  [ Hits: 632 | Votes: 2 | Rating: 4.5 ]

• DIY Dual Band 144-440 MHz vertical antenna - A homemade VHF/UHF vertical antenna made essentially with RG58 coax cable, with a 9 turns choke balun to prevent the shield acting as a RF Radiator.
  [ Hits: 1377 | Votes: 14 | Rating: 5.5 ]

• The W3EDP Antenna - A wire antenna feeded with an unsymmetrical feed and a 1:4 balun can be tuned from 6 to 80 meters band but can be noisier than a dipole and cause RF in the shack
  [ Hits: 797 | Votes: 2 | Rating: 10 ]

• mini Ring-Core-Calculator - Calculate windings on ferrite cores - The program can be used to calculate inductors (coils) and their number of turns on ferrite cores, ferrite shells and air coils. These can be used for baluns, Ununs, bandpass filters, low pass filters, resonant circuits, and more. The technical specifications of the cores are already integrated in the program. Application is free and runs on Windows 32 bit versions only. To make it run on Windows 10 64 bit need to be unzipped in a single folder.
  [ Hits: 398 | Votes: 1 | Rating: 1 ]

• Cost-effective ferrite chokes and baluns - In this article the author describes some new designs of ferrite loaded chokes for suppressing unwanted common mode currents at HF applied to feed lines like choke baluns, but also in the shack, applied to various coaxial, mains and data cables
  [ Hits: 864 | Votes: 5 | Rating: 6 ]

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