Maintainer Kit for TU-M300 including Western Electric 300B 8413. It looks that the frequency of use is low. Operation has been confirmed GE 5U4GE x 2 (operation confirmed) GE 12BH 7A 6AQ8 It have sets of Western Electric 300B. No original box of Western Electric. It have been using high-end transistor power amps for many years, but when it discovered the magnificence of vacuum tube 300B amps, it has been immediately switched to them, and listened to them for a while. After that, it has been listened to various spheres, but once it has been heard the Western Electric 300B. In the 1960s and earlier, the reverberations on the lower frequency side were more refined, but to draw out that goodness, the level of the entire system was required. Recently, it was finally possible to draw out the goodness of the balls before the 1960s, and it has been decided to dispose of the original WE balls from the 1970s and 1980s. Probably that this product is the best as a standard for introducing the Western Electric 300B. The previous owner said he didnt use it, but there is a certain has signs of use, but as you can see in the photo, you can see a considerable amount of electron emission. TU-M300. The maintainer kit for LUXMAN MB300 is a vacuum tube set for the MB-300 vacuum tube mono-main amplifier that LUXMAN released in 1984. The MB-300B seems to have been specially designed by LUXMAN for Western Electrics opening to the public, and it is speculated that general audiophiles were finally able to get the sound of the original Western Electric 300B. There is no problem with the current operation. There is a slight burn on the top of the head on the right side. It looks to be usable for quite a long time. If you are in a dark room, you can see a faint glow even with the naked eye. Please inspect pictures for condition reference. Thank you for visiting our listings. We update our inventory every 24 hours, However, some items may sell locally in between and we may need to cancel the order. Please confirm availability before buying. CAUTION: Import TAXES are responsibility of buyers.