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12AX7 (also known as ECC83 [1]) is a miniature dual-triode vacuum tube with high voltage gain. Developed around 1946 by RCA engineers [ 2 ] in Camden, New Jersey , under developmental number A-4522, it was released for public sale under the 12AX7 identifier on September 15, 1947.
This is a list of vacuum tubes or thermionic valves, and low-pressure gas-filled tubes, or discharge tubes. Before the advent of semiconductor devices, thousands of tube types were used in consumer electronics.
The next version of the Falcon, and the last tube version was released in 1967-1968. This last version was similar in specs to the previous versions but had different cosmetics, with a taller cabinet sporting a larger front mounted control panel with two rows of knobs. This version used 4x 12ax7, and 2x 6bq5 tubes, with a solid state rectifier.
The most significant difference between the two is that 6N2P has its two filament elements connected in parallel, unlike the series filament connection of the 12AX7, and it is thus only possible to operate it from a 6.3 volt, 340 mA filament supply (whereas a 12AX7 may be operated from either 6.3 or 12.6 volts, at 300 mA or 150 mA, respectively.)
Tube sockets are electrical sockets ... some minor differences in specifications, ... of the United States and most of the European tubes, e.g., 12AX7 ...
The "Tweed" 5F10 model, [2] launched in 1955, but not in time for the Fender catalog of that year, [3] was a 10-watt amplifier utilising a 6AV6 (from 1956 a 6AT6) preamplifier tube, 12AX7 phase inverter tube, [note 1] a pair of 6V6GT power amplifier tubes, and one 5Y3GT rectifier tube, [4] with a Jensen P10R 10-inch speaker. The amplifier had a ...