windom 4:1

Ferite Balus 1.8 - 30 Mhz - 1:1 and 4:1 baluns diagrams

A 4:1 Air-wound Balun - 40mm diameter grey PVC pipe with a length of 9.5cm

BALUN 4:1 by IQ9BH - A detailed homebrewing project of a 4 to 1 balun in italian

A 4:1 Air-wound Balun - Homebrew a 4 to 1 air wound balun

Air Wound 4:1 Balun - Do you want to build a high grade, very useable 4:1 Balun for less than a fiver, if the answer is YES, then this project is for you.

4:1 UnUn - Article by WB3GCK on 4 to 1 Un-Un

Balun 4:1 - 4:1 Ruthroff voltage balun design using a T200-2 Toroid core

Sloping Vee 470 - Article describes the design and simulation of a multiband Sloping Vee antenna for the HF band, using the software MMANA-GAL. Design with 470 ohms resistive loads. The antenna requires a 4:1 balun.

HF Blaster - The antenna is designed to cover 40M through to 10M meters, mounted on a fishing pole and a 4:1 balun by 2E0SDR

Build Windom Antennas - This article by EA4FSI explain how to plan and build your own windom antenna

Elecraft K2 Internal 4:1 balun - Adding an internal 4 to 1 balun to the K2