Radiowavz B11A 1:1 Voltage Air Core Balun - 1500W PEP, 200W CW Designed to handle 200W CW and 1500W SSB/PEP with a low standing wave radio (SWR). It has 1 to 1 impedance ratio. 1.8 Mhz to 30 MHz with low energy loss. Typically insertion loss is less than 0.2 dB