4 to 1 Balun
4 to 1 Balun
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This project is intended to aid in tuning a balanced antenna or feedline that has a high impedance 100-600 ohms -
A home made 4:1 Ferrite QRO Bal-un with a FB 241-61 Type K -
Online calculator for a 4 to 1 coax cable balun -
40mm diameter grey PVC pipe with a length of 9.5cm -
A single-core 4:1 current balun of improved performance by Chris Trask N7ZWY PDF file -
The 1:4 balun is of particular interest because it underlies many other configurations, and understanding it helps towards understanding the other Ruthroff balun configurations. -
4:1 Ruthroff voltage balun design using a T200-2 Toroid core -
A detailed homebrewing project of a 4 to 1 balun in italian -
A 1:4 balun suitable for folded dipole antennas -
Real 4:1 Transmission Line Balun with Balanced Load -
Step-By-Step Construction of a 4:1 Current-Type Guanella Balun by W1CG -
This article reviews the proposition that a 4:1 current balun in the style of Guanella can be constructed with both pairs of windings sharing a common magnetic circuit. -
How to build a to 1 balun by N1HFX -
I built a homebrew 75 meter Double Extended Zepp Antenna, And I needed a 4:1 Balun So I decided to Homebrew the Balun also. Here is how I did it! -
Build a Low Power 4:1 Balun , by Charles Greene, W1CG with full-color, full-resolution graphics from the pages of QRP Homebrewer -
A 1:1 to 4:1 switchable balun by N1LO -
A cost effective current-mode 1:4 balun 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. -
Contruction manual to build a 4:1 balun, it has good performance from 160 through 10 meters. -
Making a 4:1 balun with a nescafe coffee jar lid and a toroid -
4:1 FB 3061 ROD x 2 balun can handle 125 Watts -
Article by WB3GCK on 4 to 1 Un-Un -
This blog post details the construction and usage of a 4:1 current balun, using two FT240-31 ferrite cores and 12 bifilar turns. It clarifies common misconceptions about using 4:1 baluns with G5RV antennas and ladder-line to coaxial cable connections. M0PZT emphasizes the importance of proper measurements and the limitations of internal baluns in manual antenna tuners. Detailed instructions and considerations for winding and deploying the balun are provided, along with advice on choosing suitable cores and wire for various power levels and frequency ranges. -
High power 4:1 air core balun for multi band fan dipole antenna -
A 1:4 current balun made with 2 4C65 cores by PA1G in Dutch