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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Vacuum tubes Guitar amplification tubes. December Learn how and when to remove this template message. Grid bias is most often provided by a cathode resistor. The 12AX7 is basically two of the triodes from a 6AV6 – a double diode triode. Most use heaters which can be optionally wired in series The amplifier is in a perfect condition.

Kit Building 101

It has relatively high Miller capacitance, making it unsuitable for radio-frequency use. This page was last edited on 15 Decemberat Hi, I have a roland cube 30 witch I rarely use. Retrieved from ” https: 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 12AX7 was originally intended as replacement for the 6SL7 family of dual-triode amplifier tubes for audio applications.

Comments 12axx7 Trackback URL. Popular Recent Comments Archives. 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. They span a wide range of voltage gain and transconductance. In other projects Wikimedia Commons. In European usage special-quality valves of some sort were often indicated by exchanging letters and digits in the name: Thus half the voltage is across the tube at rest, half across the load resistor.


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.

Select a Tag featured 14 full-image 14 eyelet mojotone tweed deluxe kit 1 chibson aliexpress 1. It was released for public sale under the 12AX7 identifier on September 15, Email required; will not be published.

By using this site, you agree to the Terms of Use and Privacy Policy. The 12AX7 is a high-gain typical amplification factorlow-plate-current triode best suited for low-level audio voltage amplification.

A 12AX7 ‘Shootout ‘ “. The vast majority are used in new-production guitar amplifiers or for replacements in guitar and audio equipment. We never share your info. It can, of course, be wired for operation off either voltage.

Subscribe If you enjoyed this article, subscribe to receive more just like it. You can bearly h reiberl: In the US a “W” in the designation, datsheet in 12AX7WA, designates the tube as complying with military grade, higher reliability specifications.

The ‘E’ in the European designation classifies this as having a 6. Views Read Edit View history. 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 In this role it is widely used for the preamplifier input and mid-level stages of audio amplifiers.

From Wikipedia, the free encyclopedia. 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.


:: 12AX7 Vacuum Tube page

Darasheet do I go about purchasing the Grizzly H guitar kit giorgos: Unsourced material may be challenged and removed. This section does not cite any sources.

Different versions of each were designed for enhanced ruggedness, low microphonicsstability, lifespan, etc. The 12ax7 is a miniature high-mu twin triode, each section of which has an individual cathode connection.

A center-tapped heater permits operation of the tube from either a 6. 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 12×7 bypassed to reduce or eliminate AC negative feedback and thereby increase gain; maximum gain is about 60 times. The initial “12” in the designator implies a volt heater requirement; however, the tube has datashedt center-tapped heater so it can be used in either 6.

Avatars by Sterling Adventures. Terry, not sure if he replied to you, but contact Jim Sharkey at Junksville Guitars and he’ll give y Gary: Please help improve this section by adding citations to reliable sources. 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, Fatasheet, Svetlana, Tung-Soland other brands for which the firm has acquired trademark rightsdatassheet in China Shuguangand one in Slovakia JJ Electronicfor a total annual production estimated at two million units.