What is the 6JE6B vacuum tube?

The 6JE6B is a tetrode vacuum tube designed for power applications. Improved 6JE6A..

What is a 6JE6B substitute or equivalent?

Direct equivalents to the 6JE6B include 6JE6A. 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 6JE6B?

Amplification factor μ ≈ 3, transconductance gm ≈ 9.6 mA/V, plate resistance rp ≈ 5.8 kΩ, max plate voltage 990 V, max plate dissipation 30 W, heater 6.3 V / 2.5 A.

Is the 6JE6B still in production?

Production status varies by year and manufacturer. The current Amperatubes catalog classifies the 6JE6B 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 6JE6B sound like?

Improved 6JE6A.. 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.

6JE6B Tetrode Vacuum Tube

Also known as 6JE6A

Beam power tetrode rated at 30W for high-power output stages

TetrodeHeater 6.3 V · 2.5 A12-pin CompactronRCA 1965

Plate dissipation: 30W
Max plate voltage: 990V
Transconductance: 9.6mA/V

6JE6B

Characteristics

Datasheet values, once each. Every value cites its sheet.

HeaterIndirectly heated

Specifications of 6JE6B — Heater
Heater voltageVh	6.3 V
Heater currentIh	2.5 A

Limiting valuesDatasheet maximum ratings — not to be exceeded

Specifications of 6JE6B — Limiting values
Plate voltageVa max	990 V
Plate dissipationPa max	30 W
Screen dissipationPg2 max	5 W

Mechanical

Specifications of 6JE6B — Mechanical
Base	12-pin Compactron
Rarity	Common
Pinout

Small signalDatasheet parameters at the reference operating point — not limits

Specifications of 6JE6B — Small signal
Transconductance	9.6 mA/V
Plate resistance	5.8 kΩ
Amplification factor	3

Capacitances

Specifications of 6JE6B — Capacitances
Input	22 pF
Grid–plate	0.56 pF
Output	11 pF

Charactereditorial reading, not a measurement

Specifications of 6JE6B — Character
Gain	3%
Power	75%
Drive	94%
Linearity	95%

datasheet cited · model or editorial reading · catalogue value, no citation attached yet · nothing invented

Using this tube

Applications

High-power output

Generic tetrode power stage

PA/public address

Replace or compare

Sources

By Jean-Michel Falligan DevergneReviewed May 29, 2026Source : amplifiedparts 6JE6C/6LQ6 beam powerActive model : Koren pentode

Manufacturer datasheets

5 manufacturer datasheets cross-checked for 6JE6B5 verified

6JE6B DatasheetLocal mirror · PDF

SPICE models

Revision and verification status

Source: amplifiedparts 6JE6C/6LQ6 beam power
Reviewed: 2026-05-29
Status: DataModelCalc
Model: Koren pentode

Context

The 6JE6B is a indirectly-heated beam tetrode from RCA, introduced around 1965. It provides a gain factor (μ) of 3 with 5800Ω plate resistance. Commonly used in power applications. Improved 6JE6A.

History

Introduced: 1965
Manufacturer: RCA
Era: Late Production

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