12AX7. High-Mu Twin Triode. 9-PIN MINIATURE TYPE. GENERAL DATA. Electrical: Heater, for Unipotential Cathodes: Heater arrangement. Series Parallel . Resistance – coupled amplifer cathode grid bias. Limiting Values: Ua = V. Wa = 1 W. Ik = 8 mA. Ug = V. Rg = 2,2 MΩ. Uk/f = V. Rk/f = kΩ. 12AX7. 12AX7 Application Data. Class, Va, Vg1, Ia, Ra, S. Triode, , -1, , 80,, Triode, , -2, , 62,, 12AX7 Data sheet links.

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In other projects Wikimedia Commons. Grid bias is most often provided by a cathode resistor. The vast majority are used in new-production guitar amplifiers or for replacements in guitar and audio equipment.

From Wikipedia, the free encyclopedia. Popular Recent Comments Archives. You can bearly h reiberl: We never share your info. December Learn how and when to remove this template message.

Different versions of each were designed for enhanced ruggedness, low microphonicsstability, lifespan, etc. Typically a 12AX7 triode is configured with a high-value plate resistor, k 12ac7 in most guitar amps and k ohms or more in high-fidelity equipment.

12AX7 – Wikipedia

The 12AX7 is basically two of the triodes from a 6AV6 – a double diode triode. This section does not cite dayasheet sources. It is especially suited for use in resistance-coupled voltage amplifiers, phase inverters, multivibrators, and numerous industrial-control circuits where high voltage gain is desired.

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This page was last edited on 15 Decemberat It was released for public sale under the 12AX7 identifier on September 15, The 12AX7 is the most common member of what eventually became a large family of twin-triode vacuum tubes, manufactured all over the world, all sharing the same pinout EIA 9A. Views Read Edit View history. Most use heaters which can be optionally wired in series How do I go about purchasing the Grizzly H guitar kit giorgos: Terry, not sure if he replied to you, but contact Jim Sharkey at Junksville Guitars and he’ll give y Gary: Key data and drawings are shown below, or you can download the 12ax7 Datasheet in PDF format.


The 12AX7 is a high-gain typical amplification factor 12xx7, low-plate-current triode best suited for low-level audio voltage amplification. It is popular with tube amplifier enthusiasts, and its ongoing use in such equipment makes datashee one of the few small-signal vacuum tubes in continuous production since it was introduced. If the cathode resistor is unbypassed, negative feedback is introduced and each half of a 12AX7 provides a datahseet voltage gain of about 30; the amplification factor is basically twice the maximum stage gain, as the plate impedance must be matched.

Articles containing potentially dated statements from All articles containing potentially dated statements Articles needing additional references from December All articles needing additional references. The cathode resistor can be bypassed to reduce or eliminate AC negative feedback and thereby increase gain; maximum gain is about 60 times. Comments 3 Trackback URL.

The 12AX7 was originally intended as replacement for the 6SL7 family of dual-triode 12zx7 tubes for audio applications. Please help improve this section by adding citations to reliable sources. Thus half the voltage is across the tube at rest, half across the load resistor.


In this role it is widely used datsheet the preamplifier input and mid-level stages of audio amplifiers. Hi, I have a roland cube 30 witch I rarely use. Email required; will not be published.

12AX7 (GEC) – Twin Triode | eet

The amplifier is in a perfect condition. Retrieved from ” https: The ‘E’ in the European designation classifies this as having a 6. A 12AX7 ‘Shootout ‘ “. A center-tapped heater permits operation of the tube from either a 6. Vacuum tubes Guitar amplification tubes. In European usage special-quality valves of some sort were often indicated by exchanging letters and digits in the name: The 6AV6 is a miniature repackaging with just a single cathode of the triode and twin diodes from the octal 6SQ7 a double-diode triode used in AM radioswhich itself is very similar to the older type 75 triode-diode dating from Select a Tag featured 14 12ad7 14 eyelet mojotone tweed deluxe kit 1 chibson aliexpress 1.

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