A model of a practical Ruthroff 1:4balun
- The 1:4balun is of particular interest because it underlies many other configurations, and understanding it helps towards understanding the other Ruthroff balun configurations.
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The Guanella 1:4balun
- A cost effective current-mode 1:4balun can be constructed from two lengths of coax, two ferrite rods, some electrical tape, cable ties, a length of PVC water-pipe and some connectors. This form of 1:4 current-mode balun is named after G. Guanella.