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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Kit Building 101

Avatars by Sterling Adventures. Most use heaters which can be optionally wired in series 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.

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.

December Learn how and when to remove this template message. The cathode resistor can be bypassed to reduce or eliminate AC negative feedback and thereby increase gain; maximum gain is about 60 times. Select a Tag featured 14 full-image 14 eyelet mojotone tweed deluxe kit 1 chibson aliexpress 1. 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.


The 12AX7 is basically two of the triodes from a datasjeet – a double diode triode. Leave a Reply Click here to cancel reply.

Hi, I have a roland cube 30 witch I rarely use. Subscribe If you enjoyed this article, subscribe to receive more just like it.

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. It is especially suited for use in resistance-coupled voltage amplifiers, phase darasheet, multivibrators, and numerous industrial-control circuits where high voltage gain is desired.

From Wikipedia, the free encyclopedia. Different versions of each were designed for enhanced ruggedness, low microphonicsstability, lifespan, etc.

TDSL Tube data [12AX7]

This section does not cite any sources. Thus half the voltage is across the tube at rest, half across the load resistor. The ‘E’ in the European designation classifies this as having a 6. It has relatively high Miller capacitance, making it unsuitable for radio-frequency use.

In other projects Wikimedia Commons. If the cathode resistor is unbypassed, negative feedback is introduced and each half of a 12AX7 provides a typical voltage gain of about 30; the amplification factor is basically twice the maximum stage gain, as the plate impedance must be matched. 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 European usage special-quality valves of some sort were often indicated by exchanging letters and datashwet in the name: Articles containing potentially dated statements from All articles containing potentially dated statements Articles needing additional references from December All articles needing additional references.


12AX7 (GEC) – Twin Triode | eet

Comments 3 Trackback URL. This page was last edited on 15 Decemberat The 12ax7 is a miniature high-mu twin triode, each section of which has an individual cathode connection.

How do I dwtasheet about purchasing the Grizzly H guitar kit giorgos: The 12AX7 was originally intended as replacement for the 6SL7 family of dual-triode amplifier tubes for audio applications. The vast majority are used in new-production guitar amplifiers or for replacements in guitar and audio equipment.

Retrieved from ” https: Unsourced material may be challenged dwtasheet removed. 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. You can bearly h reiberl: Popular Recent Comments Archives.

A 12AX7 ‘Shootout ‘ “. They span a wide range of voltage gain and transconductance.