1968 Date Code Matched Set of 12x Sylvania 5963 [Industrial 12AU7] Vacuum Tubes
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Matched Set of 12 Sylvania 5963 [Industrial 12AU7] Long Gray Plate Vacuum Tubes
The 5963 is an excellent drop in substitute for the 12AU7 and they are said to be much nicer sounding and are rated for a longer life at 10,000 hours. These are Sylvanias have long gray plates, square getters and matching date codes of 68 12 16 dating them back to 1968. We have hundreds of these in stock all with the same date codes and we are selling them in sets of 12. We will not sell them in lower quantities. These are used tubes and on average they test at about 90%. We tested and matched them by both Gain and Gm at real world voltages on a Maxi-Preamp tester. We put the test data on stickers and stuck them to the tubes, they are easily removable. These do not come with any boxes.