Triode valve (ECC 82) on board.

The Triode Valve (ECC82) on board is a classic dual triode vacuum tube commonly used in audio and signal amplification circuits. It is also known as 12AU7 and is prized for its balanced gain and low noise characteristics.

Key Features

Dual Triode Design: Contains two independent triodes within one glass envelope, each with separate cathode, grid, and plate electrodes.

Heater Voltage: Can operate at either 6.3V or 12.6V heater voltages, with heater currents of 300mA (6.3V) or 150mA (12.6V).

Amplification Factor: Approximately 17, offering moderate gain suited for audio preamplification and phase splitting.

Plate Voltage: Maximum plate voltage around 250-300V, with plate dissipation up to 2.75W, enabling reliable operation in audio and low-frequency circuits.

Transconductance: Around 2.2 mA/V, contributing to stable and linear amplification behavior.

Package: Noval 9-pin glass envelope commonly used in vintage and modern audio circuits.

Applications: Widely used in hi-fi preamplifiers, guitar amplifiers, microphone preamps, and other audio signal processing devices.

Operational Aspects

Heater-cathode voltage tolerance is around 180V, and the device offers high grid resistance for effective signal handling.

The valve operates at typical currents of about 10.5mA per triode with moderate plate voltages ensuring low distortion and clean sound reproduction.

Due to its dual triode design, it is often used for push-pull circuits and phase splitting in amplifiers.

This ECC82 triode valve on board provides a classic, reliable component well-suited for audio amplification and signal processing tasks in various electronic and musical equipment.