1:1 toroid balun

1:1 toroid balun

Antennas : Baluns

• 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 ]

• Balun 1:1 - 1:1 Ruthroff voltage balun using a T200-2 Toroid core
  [ Hits: 1483 | Votes: 2 | Rating: 4 ]
• How to Build a UN-UN - Building a 1:1 balun, aka un-un, with an Amidon Ferrite toroid core T 200
  [ Hits: 1063 | Votes: 6 | Rating: 4.17 ]

• 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 ]