It was determined that the pair tube was made of RFT from the 6CA7 compatible sphere structure. Measured value 44/44 (rejected value 30) with replacement box, both tubes have tube burns, getter burns, and printing on one side is often erased, so they are inexpensive ※Pairs are judged based on gM values measured by the testing machine TV-7 (Kojima Yosuke)
Accessories: replacement box