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The 12AU7, on the other hand, is described as an "A.F. double triode". [3] Data sheets suggest an upper frequency limit of 30 kHz for the 12AU7/ECC82 and it is not described as a "special quality" device. [4] This contrasts with the 6AB4/EC92 and 12AT7/ECC81 which are both R.F. devices operating up to VHF.
Sylvania 12AX7 datasheet 12AX7 (also known as ECC83 [ 1 ] ) is a miniature dual- triode vacuum tube with high voltage gain . Developed around 1946 by RCA engineers [ 2 ] in Camden, New Jersey , under developmental number A-4522, it was released for public sale under the 12AX7 identifier on September 15, 1947.
23.2 General literature and data sheets. 24 See also. ... This is a list of European Mullard–Philips vacuum tubes and their American equivalents. ... ECC82/12AU7 ...
12AT7 (also known in Europe by the Mullard–Philips tube designation of ECC81) is a miniature nine-pin medium-gain (60) dual-triode vacuum tube popular in guitar amplifiers. It belongs to a large family of dual triode vacuum tubes which share the same pinout (EIA 9A), including in particular the very commonly used low-mu 12AU7 and high-mu 12AX7.
Continuously transmitting tubes: Maximum anode dissipation in W or kW in Class-C amplifier telegraphy; Pulsed transmitting tubes: Maximum peak anode current in A (number preceded by "P") Rectifiers: Maximum average anode current in mA; Thyratrons: Maximum average anode current: Less than 3 digits: in mA; 3 or more digits: 1st digit: =0 – in mA
The 12AX7 is a dual "high mu" (high ... (standard and special-quality equivalents of the same tube include 12AU7, ECC82, B329, CV491 ... Vacuum tube data sheet locator;
The most significant difference between the two is that 6N2P has its two filament elements connected in parallel, unlike the series filament connection of the 12AX7, and it is thus only possible to operate it from a 6.3 volt, 340 mA filament supply (whereas a 12AX7 may be operated from either 6.3 or 12.6 volts, at 300 mA or 150 mA, respectively.)
The 1946 miniature 12AU7/ECC82, ... List of vacuum tubes; 12AT7; 12AU7; 12AX7; References ... The Tube Collectors Association; Datasheet on the 6SN7;