 | Vacuum Tube - 5Y3 S, JJ Electronics, RectifierThe JJ Electronic 5Y3S is a ruggedly built octal rectifier tube with a directly heated cathode. This tube’s solid construction and thick glass envelope offer high reliability. The JJ 5Y3S will work in any 5Y3 position.
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 | Vacuum Tube - 5U4GB, JJ ElectronicsThe JJ Electronic 5U4GB is an excellent choice for an economically priced tube rectifier. Used in many Hi-Fi and guitar amplifiers, JJ delivers a robust and solidly built tube. This full wave rectifier will work in any 5U4 application.
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 | Vacuum Tube - 6550, JJ ElectronicsThe JJ Electronic 6550 is a robust tube built in the rugged fashion that JJ is famous for. At 35 Watts, these tubes have a warm round tone with a thick and defined low end. The JJ 6550 is an excellent choice for bass heads, tube organs, and Hi-Fi amplifiers.
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 | Vacuum Tube - 12AX7/ECC83, Electro-HarmonixThis Russian tube is full bodied and bright with a more straightforward presentation. It packs a lot of bite with its higher-than-normal gain. In overdrive, it offers a lot of crunchy fizz. High gain preamplifier tube with ultra low noise and detailed, musical tone. Unique spiral filament eliminates filament to cathode induced hum common on amplifiers that use AC on the filaments.
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 | Vacuum Tube - ECC803/12AX7, JJ Electronics, Long PlateA high performance, long plate version of the ECC83 / 12AX7. Like all JJ preamp tubes, these are built into a rugged package using the spiral filament and robust plate structure resulting in low microphonics and high reliability. The long plate version of this tube differs from the standard version with its stronger and fuller sound. This tube will work in any 12AX7 or ECC83 position.
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 | Vacuum Tube - EL84, SovtekThe Sovtek EL84 series produce an unbeatable smooth, warm, distortion. Excellent replacements in vintage VOX AC-30s and the like. Tube measurements are as follows:
- Height: 2.75” (without pins)*
- Diameter: 0.87”*
*Note: Due to the method of production in regards to the glass, measurements may vary slightly.
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 | Vacuum Tube - KT88, JJ ElectronicsA sonically faithful reproduction of the original tubes with a robust construction encased in a thick glass envelope. The JJ KT88 delivers a powerful 42 Watts with plenty of headroom to spare. This tube has a tone that is warm and lively with a detailed and balance response. The JJ KT88 is an excellent choice for Hi-Fi stereo equipment as well as guitar amplifiers. It can be used in place of 6550 tubes.
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 | Vacuum Tube - 6L6GC, Tube Amp DoctorOctal power tube (Max Plate Watts = 30W) TAD 6L6GC-STR RCA-Style black-plate. TAD has the remakes of the all time favorite 6L6 classics by RCA and GE. The TAD 6L6GC-STR is your perfect choice if you are up for the sound of the rock legends.
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 | Vacuum Tube - 12AX7B, China9 pin miniature preamp tube (Amplification Factor = 100). The Chinese 12AX7B is very similar in tone to its standard Chinese cousin, but the Bs seem to average in at slightly lower gain and noise.
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 | Vacuum Tube - 12DW7/ECC832, JJ Electronics, Dual TriodeIn the 12DW7/ECC832, Section 1 of the tube (pins 6, 7, and 8) is the high gain 12AX7/ECC83 spec (gain factor 100) and Section 2 (pins 1, 2, and 3) is the low gain 12AU7/ECC82 spec (gain factor 17).
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