2x Boonton Radio Corporation Coupling Transformer 564-A BNC Inductor Calibration2x Boonton Radio Corporation Coupling Transformer 564 A BNC Inductor Calibration Units are used, untested but look in good condition, intact. IKC 50KC 500 Ohms Output 0. 3 Ohms International buyers ? please note: Import duties, taxes, and charges are not included in the item price or postage cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be, prior to