High power and broadband compatibility: Power resistance up to 200W (SSB), support 1-56MHz full frequency band, meet the high intensity requirements of shortwave communication, stable signal without interference Precise impedance conversion: 1:2 transformation ratio realizes 50 ohm unbalanced to 100 ohm balanced output, specially optimized for QUARD ANT antenna, improves antenna matching efficiency and reduces signal reflection. Excellent performance indicators: Standing wave ratio is less than 1.5, maximizes energy transmission efficiency, reduces loss, suitable for professional radio applications Waterproof and : Pre-set waterproof measures, users only need to deal with external interfaces; compact size and light weight, easy for outdoor deployment and mobile use When directly connecting the antenna vibrator, use the included copper nose to fix it; after installation, apply waterproof glue to the M seat and cable connector to enhance protection. Suitable for amateur radio stations, emergency communications and base station construction to improve the performance of your antenna system. to experience efficient and stable shortwave communication solutions! Main parameters Transformation ratio: 1:2 Input impedance: 50 ohms (unbalanced) Output impedance: 100 ohms (balanced), optimized for QUARD ANT antenna Frequency range: 1-56MHz, fully covering the shortwave frequency band Standing wave ratio: less than 1.5, ensuring low-loss and efficient transmission Power resistance: 200W (SSB mode), stable support for high-load work Dimensions: outer diameter 57x175mm, compact and Accessories: Comes with epoxy resin plate and 304 stainless steel ring, with two copper noses for connecting the vibrator Waterproof design: The balun body has been waterproofed, and the user only needs to simply waterproof the M seat and cable connector Color: As Shown Material: plastic Package Contents: 1 * Balun Antenna kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.