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TELEFUNKEN

ECC82-TK Vacuum Tube, Matched Quad, Balanced Triodes

Tubes

Dual-triode vacuum tube set, matched quad, balanced triodes, medium gain, low noise, gold-plated pins

$531.00 CAD
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Description

This matched quad of ECC82-TK dual-triode vacuum tubes is designed for hi-fi systems, phono stages, headphone amplifiers, and instrument amplifiers. Its medium-gain, low-noise characteristics support line amplification, driver stages, and phase-inverter circuits with focused imaging, wide dynamics, bright tonality, flat mids, and tight lows.

Balanced triodes promote consistent performance across both sections of each tube, while the matched set supports stable operation in multi-tube equipment. Each tube is cryogenically treated, measured for gain, transconductance, noise, and microphonics, then burned in and retested for stability. Gold-plated pins support reliable signal transfer.

Features

Matched Quad
Four carefully matched tubes support consistent performance in compatible multi-tube equipment.

Balanced Triodes
The two triode sections within each tube are balanced for dependable, low-noise operation.

Medium-Gain Performance
Suitable for line amplification, driver stages, and phase-inverter circuits requiring clean headroom.

Low-Noise Design
Low-noise characteristics suit sensitive audio applications such as phono stages and headphone amplifiers.

Versatile Amplifier Use
Compatible with hi-fi audio equipment, instrument preamplifiers, and push-pull amplifier circuits.

Selected and Tested
Each tube is measured for gain, transconductance, noise, and microphonics, followed by burn-in and retesting.

Gold-Plated Pins
Gold-plated pins support dependable electrical contact and signal integrity.

Cryogenic Treatment
Newly manufactured tubes receive cryogenic treatment as part of the production process.

Specifications

General Specifications
Tube Type: Balanced R.F. dual triode
Configuration: Matched set of four
Equivalent Tube Type: 12AU7
Base: Noval
Pin Count: 9

Heater Requirements
Heater Voltage: 6.3 V
Heater Current: 300 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
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: 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: 49.2 mm
Height Including Pins: 55.6 mm
Diameter: 22 mm
Weight per Tube: 8.5 g

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