TELEFUNKEN ECC82-TK Matched Quad Black Diamond Series 9 Pin Replacement Vacuum Tube 12AU7

The TELEFUNKEN Elektroakustik ECC82-TK is a newly manufactured and cryogenically treated rendition of the classic ECC82, commonly known by the American designation 12AU7.

The ECC82 is a dual triode vacuum tube with medium gain and low noise characteristics, making it ideal for hi-fi audio equipment and instrument amplification. Commonly used as a low-noise line amplifier, driver, and phase inverter in push-pull amplifier circuits, it can replace an ECC81/12AX7 for lower gain applications.

The Black Diamond Series ECC82-TK features gold-plated pins and a gold-plated internal grid. The ECC82-TK is often considered more of a brighter tonal character rather than warm, and is characterized by its wide sense of dynamics and exceptionally quiet noise floor. It offers an accurate and focused image with a flat midrange and tight low end. The ECC82-TK is excellent in headphone amplifiers and high-end home audio and phono equipment, among many other applications. The Black Diamond Series ECC82-TK undergoes rigorous quality control and testing to deliver a dependable tube for the most demanding applications.

Technical Specifications

Type
R.F. Dual Triode
Base
Noval
Number of Pins
9-Pin

Parallel Configuration - Pins 9-(4+5)
Parameter – Symbol – Value – Unit
Heater Voltage – Vf – 6.3 – V
Heater Current – If – 300 – mA
Series Configuration - Pins 4-5
Parameter – Symbol – Value – Unit
Heater Voltage – Vf – 12.6 – V
Heater Current – If – 150 – mA
Direct Interelectrode Capacitances (per triode)
Grid to Cathode and Heater – Cg - 1.9 - pF
Plate to Cathode and Heater - Ca - 1.9 - pF
Grid to Plate – Cga - 1.63 - pF
Maximum Ratings - Design Maximum Values
Plate Voltage - Va - 300 - V
Plate Dissipation – Pa - 2.75 - W
Cathode Current - Ik - 20 - mA
Grid Voltage – Vg - -50 - V
Grid Resistor (self bias) - Rg – 1 – Mk ohm
Cathode to Heater Voltage - Vkf - 180 - V
Cathode to Heater Resistance – Rkf – 150 – kk ohm
Typical Operation and Characteristics - Class A, Amplifier
Plate Voltage – Va – 250 - V
Grid Voltage - Vg - -8.5 - V
Plate Current – Ia - 10.5 - mA
Transconductance – gm - 2.2 - mA/V
Internal Plate Resistance (approx.) – ra - 7.7 – k ohm
Amplification Factor - Mu - 17