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 the US a “W” in the designation, as in 12AX7WA, designates the tube as complying with military grade, higher reliability specifications.
TDSL Tube data [12AX7]
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 datsaheet estimated at two million units. 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.
Email required; will not be published. It is especially suited for use in resistance-coupled voltage amplifiers, phase inverters, multivibrators, and numerous industrial-control circuits where datasheef voltage gain is desired. Key data and drawings are shown below, or you can download the 12ax7 Datasheet in PDF format. It can, of course, be wired for operation off either dagasheet.
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12AX7 Datasheet(PDF) – General Electric Company
Grid bias is datashet often provided by a cathode resistor. Terry, not sure if he replied to you, but contact Jim Sharkey at Junksville Guitars and he’ll give y Gary: A center-tapped heater permits operation of the tube from either a 6. Different versions of each were designed for enhanced ruggedness, low microphonicsstability, lifespan, etc. A 12AX7 ‘Shootout ‘ “. We never share your info. The 12ax7 is a miniature high-mu twin triode, each section of which has an individual cathode connection.
Select a Tag featured 14 full-image 14 eyelet mojotone tweed deluxe kit 1 chibson aliexpress 1. Leave a Reply Click here to cancel reply. In European usage special-quality valves of some sort were often indicated by exchanging letters and digits in the name: Most dahasheet heaters which can be optionally wired in series 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.
Dattasheet 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 was originally intended as replacement for the 6SL7 family of dual-triode amplifier tubes for audio applications.
Avatars by Sterling Adventures. It has relatively high Miller capacitance, making it unsuitable for radio-frequency use.
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Kit Building 101
The 12AX7 is datasbeet high-gain typical amplification factorlow-plate-current triode best suited for low-level audio voltage amplification. This page was last edited on 15 Decemberat 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.
Unsourced material may be challenged and removed. Comments 3 Trackback URL. The ‘E’ in the European designation classifies this as having a 6.
They span a wide range of voltage gain and transconductance. The amplifier is in a perfect condition.
The vast majority are used in new-production guitar amplifiers or for replacements in guitar and audio equipment. The 12AX7 is basically two of the triodes from a 6AV6 – a double diode triode. Views Read Edit View history. It was released for public sale under the 12AX7 identifier on September 15, Thus half the voltage is across the tube at rest, half across adtasheet load resistor.
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