The Yaesu FC-30 Tuner is designed for the FT-897 and FT-897D and bolts to the side of the radio. It covers 1.8 - 30 and 50 - 54 MHz, handling up to 100 watts with a VSWR of 1.5:1 or less. Tuneup power is 4 to 60 watts and tuning takes 5 seconds or less. There are 100 impedance matching memories. This tuner pulls the required 13.7 VDC directly from the transceiver. The impedance matching is 16.5 to 150 ohms and accordingly, the FC-30 should not be expected to match "long wire" type antennas unless specific steps have been taken in the design of the antenna to insure it is within these specifications. Internal DIP switches permit you: to clear memories and/or have the tuner operate during receive.