9:1 or 4:1 or 1:1 Balun unun MK2 wideband 1-50 MHz View Gallery Product Details 9:1 or 4:1 or 1:1 Balun unun MK2 wideband 1-50 MHz 91BALUNUNUN1030 Product Condition: New Units in Stock: 10 Product Options 4:1* 4:1 9:1 1:1 £24.00 inc. tax Product Description 9:1 balun (unun). Wide band 1 to 30 MHz. Perfect for long wire antennas. Covers all the hf bands some without need for any ATU !Use as a backpack sota antenna on fishing pole, or home install to a random length of wire.If you can get the wire vertical then your in for real DX.4:1 version ideal for loops, off centre dipoles ect.1:1 version high common mode choke ideal to stop rf on outside of coax (40 db att)PREMIUM QUALITY MADE IN UK by SuperYagiAntennas 1 to 50 MHz. 300 watts pep handling. High Quality Waterproof poly enclosure. Marine grade stainless steel Imported core for this wideband design not a powder iron core. Teflon silver plated wire (very expensive) to handle the heat and match the correct 50 ohm impedance needed. High temperature teflon cloth rapped core.