The MFJ-913 4:1 current balun is ideal for folded dipoles, delta loops, or other medium impedance balanced antennas where ATUs are not required. The MFJ-913 is easy to use, whether you are a seasoned ham radio operator or just starting out, the MFJ-913 is a reliable and efficient tool for enhancing your HF radio experience.
MFJ 4:1 current baluns are designed to replace the center insulator of a dipole antenna. They are made up of two large low-permeability ferrite cores. The MFJ-913 is rated at 300 watts and the MFJ-919 is rated at 1500 watts. Their SO-239 coax connectors have Teflon™ internal insulation for maximum insulation and extended life of the product. Unlike some other baluns, the MFJ-913 and MFJ-919 make direct electrical connections to the antenna with #14 stranded copper wire and are enclosed in Schedule-40 PVC for maximum strength and support of a dipole antenna. A current balun can reduce or eliminate stray RF often found on coax. This stray RF can cause burns and other problems with electronic equipment while reducing antenna radiation. Installation of an MFJ-913 or MFJ-919 current balun can increase the efficiency of any amateur station.
* Current type * Ratio 4:1 * 50 Ohms * Freq. 3.5-30MHz * Power 300W * Socket SO-239 * Eye bolt fasteners * Size 45 x 93mm (body only) * Weight 225g.
Our Price Match Promise means that if you find any of our Equipment at a lower advertised price elsewhere, we will match the price for you, subject to the below.
- The product is identical to ours in brand, colour, size and model number.
- The price must be the advertised price clearly on the competitor's online site.
- The item must be in stock and available for immediate purchase (rather than available to order), with the authorised stockist able to complete delivery within 2-3 days.
Please fill out the form below. The details will be used to help us with your price promise request.