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TELEFUNKEN

ECC82-TK Vacuum Tube, Matched Quad

Tubes

Dual-triode vacuum tube set, matched quad, medium gain, low noise, gold-plated pins and internal grids

$499.00 CAD
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Description

This matched quad of ECC82-TK dual-triode vacuum tubes is designed for hi-fi equipment, phono stages, headphone amplifiers, and instrument amplifiers. Its medium-gain, low-noise performance suits line amplification, driver stages, and phase-inverter circuits while providing bright tonality, a flat midrange, focused lows, and wide dynamics.

The ECC82-TK is equivalent to a 12AU7 and can replace ECC81 or 12AX7 tubes when lower gain is required by compatible equipment. Gold-plated pins and internal grids support signal integrity, while careful matching helps provide consistent performance across all four tubes.

Features

Matched Set of Four
Four performance-matched tubes support consistent operation in compatible multi-tube equipment.

Medium-Gain Output
Suitable for audio circuits requiring clean headroom and less gain than ECC81 or 12AX7 tubes.

Low-Noise Performance
Well suited to sensitive applications such as phono stages, headphone amplifiers, and instrument preamplifiers.

Versatile Circuit Applications
Suitable for line amplification, driver stages, and phase-inverter duties in compatible equipment.

Defined Tonal Character
Produces bright tonality with a flat midrange, focused low frequencies, and versatile dynamics.

Gold-Plated Components
Gold-plated pins and internal grids support dependable electrical contact and signal integrity.

Specifications

General Specifications
Tube Type: R.F. dual triode
Set Configuration: Matched quad
Equivalent Tube Type: 12AU7
Base: Noval
Pin Count: 9

Heater Requirements
Parallel Heater Voltage: 6.3 V
Parallel Heater Current: 300 mA
Series Heater Voltage: 12.6 V
Series Heater Current: 150 mA

Maximum Ratings
Plate Voltage: 300 V
Grid Voltage: -50 V
Cathode-to-Heater Voltage: 180 V
Cathode Current: 20 mA
Plate Dissipation: 2.75 W
Cathode-to-Heater Resistance: 150 kΩ
Self-Bias Grid Resistor: 1 MΩ

Typical Characteristics
Plate Voltage: 250 V
Grid Voltage: -8.5 V
Plate Current: 10.5 mA
Transconductance: 2.2 mA/V
Internal Plate Resistance: Approximately 7.7 kΩ
Amplification Factor: 17 µ

Interelectrode Capacitance
Grid-to-Cathode and Heater: 1.9 pF
Plate-to-Cathode and Heater: 1.9 pF
Grid-to-Plate: 1.63 pF

Physical Specifications
Height Excluding Pins: 49 mm
Height Including Pins: 56 mm
Diameter: 22 mm
Weight per Tube: 11.3 g

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