4:1 Current Balun QRO

A QRO 4:1 Current Balun (Guanella) for use with OCFD, Loops and other situations where your aerial is around 200ohms.  Do not be fooled by cheap (and poor design) single-core versions - only a twin-core such as this will work as an effective Current Balun.  This means that you won't need any further choking (loops of coax, ferrite rings etc).

This is our "big box" solution (much like its End-Fed cousin) for mounting onto a 2" (or smaller) pole and features integral bracket and V-Bolt hardware.

• Designed for 1.8MHz to 30MHz
• 800-watt continuous rating (1500-watt max)
• FT290 (2.9") ferrite cores
• SO239 connector and 4mm terminals
• Eye-bolts for strain-relief
• 165x130x80mm
• Weather-proof
• Weight: 1.2kg

A smaller 400-watt version is also available.