Ruby Tubes 12AX7 Vacuum tubes/ Valves
Ruby Tubes: High Quality 12AX7 or ECC83 dual triode Amplifier or Audio Valve/Vacuum Tube.
12AX7 (also known as ECC83) is a miniature dual triode vacuum tube with high voltage gain. It was developed around 1946 by RCA engineers in Harrison, New Jersey, under developmental number A-4522. It was released for public sale under the 12AX7 identifier on September 15, 1947. The 12AX7 was originally intended as replacement for the 6SL7 family of dual-triode amplifier tubes for audio applications. It is popular with tube amplifier enthusiasts, and its ongoing use in such equipment makes it one of the few small-signal vacuum tubes in continuous production since it was introduced.
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