Condition is PREOWNED USED “AS IS” UNKNOWN Function-ability for original use. I do not have the capacity to test this tube, but it looks quite good (exam the pictures). This vintage tube from Raytheon, model JAN 5R4WGB is a rare find for any collector or enthusiast. With its unique design and unit type, it offers a piece of retro history that cannot be replicated. It has been well-preserved.