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In this role it is widely used for the preamplifier (input and mid-level) stages of audio amplifiers. It has relatively high Miller capacitance, making it unsuitable for radio-frequency use. Typically a 12AX7 triode is configured with a high-value plate resistor, 100 kohms in most guitar amps and 220 kΩ or more in high-fidelity equipment.
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 ...
The Z-Wreck is a Vox AC30-style amp that was originally made for country guitar player, Brad Paisley. Fischer's final design, the Songwriter 30, was licensed under Komet Amps. It features four cathode-biased EL84/6BQ5 output tubes and two 12AX7 preamp tubes.
The circuitry of this 30-watt amplifier is typical of its day, with a 5Y3 rectifier tube, one 12AX7 preamp tube, one 12AX7 for phase inversion, a 6SN7 additional gain stage, four 6V6 power tubes, and a 6SJ7 (1954-1958) or a 6AU6 (1958-1960) for the built-in vibrato unit. What makes it unique is the cabinet.
The DeVille features a 60-watt valve amplifier with three 12AX7 preamp valves and two 6L6 output valves. Its circuitry includes full PCB with valves and pots mounted directly to the circuit board. The 410 utilized 10" Fender Special Design speakers made by Eminence and was offered for versions II and III.
The amplifier has a 5Y3-GT rectifier, 2 6V6-GT power tubes operating in push-pull mode, and a 12AY7 and a 12AX7 in the preamp. [12] The output is rated at about 15 watts. [13] The Tweed Deluxe originally came equipped with a Jensen P12R speaker. Due to limited power handling, owners sometimes replaced it with the more powerful Jensen P12Q.
Rear view of a valve combo guitar amplifier. Visible are two glass 6L6 output tubes, six smaller 12AX7 preamp tubes in their metal tube retainers and both the power transformer and the output transformer. Guitar amplifiers are often designed so they can, when desired by the guitarist, distort and create a tone rich in harmonics and overtones.
Mesa/Boogie first created two distinct prototypes, known as Revisions A and B, before settling on the Revision C circuit for the Dual Rectifier's debut. [ 2 ] [ 3 ] Mesa/Boogie founder Randall Smith stated that he and the amp's other designers took inspiration from the local Bay Area hot rod scene, especially what Smith observed to be the ...