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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It has relatively high Miller capacitance, making it unsuitable for radio-frequency dataeheet. Typically a 12AX7 triode is configured with a high-value plate resistor, k ohms in most guitar amps and k ohms or more in high-fidelity equipment.

By using this site, you agree to the Terms of Use and Privacy Policy. In European usage special-quality valves of some sort were often indicated by exchanging letters and digits in datsaheet name: Thus half the dataxheet is across the tube at rest, half across the load 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. It was released for public sale under the 12AX7 identifier on September 15, Vacuum tubes Guitar amplification tubes.

They span a wide range of voltage gain and transconductance. This page was last edited on 15 Decemberat The initial “12” in the designator implies a volt heater requirement; however, the tube has a center-tapped heater so it can be used in either 6.

The 12AX7 is a high-gain typical amplification factorlow-plate-current triode best suited for low-level audio voltage amplification. Most use dayasheet which can be optionally wired in series It is popular with tube amplifier enthusiasts, and its 12wx7 use in such equipment makes it one of the few small-signal vacuum tubes in continuous production since it was introduced.


Hi, I have a roland cube 30 witch I rarely use. Email required; will not be published.

The 12AX7 was originally intended as replacement for the 6SL7 family of dual-triode amplifier tubes for audio applications. All information is deemed reliable dataheet not guaranteed. The 12AX7 is basically two of the triodes from a 6AV6 dataaheet a double diode triode. Terry, not sure if he replied to you, but contact Jim Sharkey at Junksville Guitars and he’ll give y Gary: Grid bias is most often provided by a cathode resistor.

It can, of course, be wired for operation off either voltage. We never share your info. A center-tapped heater permits operation of the tube from either a 6.

Please help improve this section by adding citations to reliable datasheett. 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.

The amplifier is in a perfect condition. The 12ax7 is a miniature high-mu twin triode, each section of which has an individual cathode connection.

You can bearly h reiberl: The ‘E’ in the European designation classifies this as having a 6. Different versions of each were designed for enhanced ruggedness, low microphonicsstability, lifespan, etc.

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December Learn how and when to remove this template message. This section does not cite any sources. How do I go about purchasing the Grizzly H guitar kit giorgos: In this role it is widely used for the preamplifier input and mid-level stages of audio amplifiers.


Unsourced material may be challenged and removed. It is especially suited for use in resistance-coupled voltage amplifiers, phase inverters, multivibrators, and numerous industrial-control datasueet where high voltage gain is desired. Retrieved from ” https: In the US a “W” in the designation, as in 12AX7WA, designates the tube as complying with military grade, higher reliability specifications.

12AX7 Datasheet(PDF) – General Electric Company

Key data and drawings are shown below, or you can download the 12ax7 Datasheet in PDF format. Avatars by Sterling Adventures. Subscribe If you enjoyed this article, subscribe to receive more just like it.

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Leave a Reply Click here to cancel reply. 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. Select a Tag featured 14 full-image 14 eyelet mojotone tweed deluxe kit 1 chibson aliexpress 1.

Views Read Edit View history. As of [update] the 12AX7 was made in various versions by two factories in Russia Winged C, formerly Svetlana, and New Sensorwhich produces tubes under the Sovtek, Electro-Harmonix, Svetlana, Tung-Soland other brands for which the firm has acquired trademark rightsone in China Shuguangand one in Slovakia JJ Electronicfor a total annual production estimated at two million units.