What is the ECC83 vacuum tube?

The ECC83 is a triode vacuum tube designed for preamp applications. European 12AX7..

What is a ECC83 substitute or equivalent?

Direct equivalents to the ECC83 include 12AX7. These share the same pinout and operating envelope, so they can usually be swapped without circuit changes — though batch-to-batch variations between manufacturers (NOS vs current production) may shift the sonic character noticeably.

What are the key specifications of the ECC83?

Amplification factor μ ≈ 100, transconductance gm ≈ 1.6 mA/V, plate resistance rp ≈ 62.5 kΩ, max plate voltage 300 V, max plate dissipation 1 W, heater 6.3 V / 0.3 A.

Is the ECC83 still in production?

Production status varies by year and manufacturer. The current Amperatubes catalog classifies the ECC83 as Common availability. NOS (new-old-stock) examples from RCA, Mullard, Tung-Sol, GE, Sylvania and Telefunken trade among collectors; modern production where it exists comes mostly from JJ Electronic, Electro-Harmonix, Tung-Sol (New Sensor), Genalex, and a handful of small-batch makers.

What does the ECC83 sound like?

European 12AX7.. Sonic character also depends heavily on the circuit operating point, the surrounding tubes in the stage, and the output transformer when present — use the interactive loadline calculator on this page to explore the trade-offs.

By Jean-Michel Falligan Devergne · Reviewed May 29, 2026

←ECC83

← ECC82 ECC85 →Compare → 12AX7

ECC83 Triode Vacuum Tube

Dual triode6.3V / 0.3A9-pin NovalSPICE

SourceMullard·Telefunken datasheetReviewed2026-05-29StatusDataModelCalcModelKoren v1PDF

High-gain dual triode — the standard for guitar and hi-fi preamps

Datasheet ↗SPICE

ECC83 — Mullard·Telefunken — triode vacuum tube — (1953)

100

62.5kΩ

1.6mA/V

1.5pF

1.6pF

0.40pF

GAIN100%

POWER3%

DRIVE38%

LINEARITY50%

SPECIFICATIONS

Heater6.3 V · 0.3 A

Max Plate Voltage300 V

Pa max1 W

Gain Factor100

gm1.6 mA/V

rp62.5 kΩ

Inter-electrode capacitances

Cgk1.5 pF

Cgp1.6 pF

Cpk0.4 pF

Pinout9-pin Noval

Era1953

RarityCommon

HEATER6.3V / 0.3A

MAX PLATE300V / 1W

BASEnoval

SECTIONS2 (dual)

Source datasheets

5 manufacturer datasheets cross-checked for ECC83

5 verified

TYPICAL OPERATING POINT

SPICE model(3 available)2 .subckt available ↓

Va180V

Ia0.79mA

Vg-1.59V

Pd0.14W

RL220kΩ

Av37.6dB

EXECUTIVE SUMMARY

The ECC83 is a dual indirectly-heated triode from Mullard·Telefunken, introduced around 1953. It provides a gain factor (μ) of 100 with 62.5kΩ plate resistance. Commonly used in preamp applications. European 12AX7.

APPLICATIONS

Voltage amplifierHigh-gain preampPhase splitter

Fender Tweed preampMarshall JTM45 V1Vox AC30 preampMarantz 7 phono stage

• Guitar amp• Hi-Fi stereo• Headphone amp• Studio/recording

VS 12AX7

μ 0%Rp +0%Pd 0%Full comparison →

HISTORY

Introduced1953ManufacturerMullard·Telefunken

Golden Age

ECC83 Datasheet

Local mirror · PDF

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METRIX TESTER

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SIMILAR TRIODES

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01APreamp 100THTransmitting (SET)101DPower (SET)10YPower (SET)12AT7Driver 12AU7Line / Headphone 12AX7Preamp 12AY7Preamp

ECC83 Triode Vacuum Tube

Source datasheets

Test this tube on a Metrix

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