Matched Pair Beckman 5963/12AU7/ECC83 Vacuum Audio Tube

  Brand Beckman Model 5963, essentially a 12AU7 with certain characteristics modified for use in special non-audio applications. Getter Ridge Round O Getter Mica Double Mica Plate Grey Plate Type                                          Double Triode Use Vf 12.6 Volts / If 0.15 Ampere / Indirect   Designed for computer use and can be operated under cut-off conditions for long periods without degradation. Similar/Equiv ECC82 CV3900 104656 GB-5963 Condition Tested Tubes per listing 2   Confused about which tubes to get? The differences between 12AX7, 12AT7 , and 12AU7 tubes(Here are the most common applications and options for substituting tubes)Tubes, or valves, are used in all sorts of of electronic equipment. Commonly, you will find the in guitar amplifiers, expensive vintage preamps, HAM radios, microphones, and they come in thousands of different brands, models, and constructions. While there are hundreds of di