The CB-4-1500TS Balun is a 4:1 impedance transformer designed to step down balanced ladder line feed point impedances of 600-50 ohms to 150-16.7 ohms unbalanced coax at full legal amateur power of 1500 watts PEP from 1.8 to 31 MHz. When connected to an antenna tuner output capable of tuning a 3:1 SWR range (16.7-150 ohms for 50 ohm coax) the CB-4-1500AT provides a suitable range for antenna tuner adjustment to 1:1 SWR as seen on the input of the antenna tuner. Also works with 75 ohm coax as well.
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