What is the 6JQ6 vacuum tube?

The 6JQ6 is a tetrode vacuum tube designed for power applications. Compact sweep output..

What are the key specifications of the 6JQ6?

Amplification factor μ ≈ 6, transconductance gm ≈ 4.2 mA/V, plate resistance rp ≈ 10.5 kΩ, max plate voltage 425 V, max plate dissipation 10 W, heater 6.3 V / 1.2 A.

Is the 6JQ6 still in production?

Production status varies by year and manufacturer. The current Amperatubes catalog classifies the 6JQ6 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 6JQ6 sound like?

Compact sweep output.. 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.

6JQ6 Tetrode Vacuum Tube

Beam power tetrode rated at 10W for high-power output stages

TetrodeHeater 6.3 V · 1.2 A12-pin CompactronRCA 1962

Plate dissipation: 10W
Max plate voltage: 425V
Transconductance: 4.2mA/V

6JQ6

Characteristics

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

HeaterIndirectly heated

Specifications of 6JQ6 — Heater
Heater voltageVh	6.3 V
Heater currentIh	1.2 A

Limiting valuesDatasheet maximum ratings — not to be exceeded

Specifications of 6JQ6 — Limiting values
Plate voltageVa max	425 V
Plate dissipationPa max	10 W
Screen dissipationPg2 max	2 W

Mechanical

Specifications of 6JQ6 — Mechanical
Base	12-pin Compactron
Rarity	Common
Pinout

Small signalDatasheet parameters at the reference operating point — not limits

Specifications of 6JQ6 — Small signal
Transconductance	4.2 mA/V
Plate resistance	10.5 kΩ
Amplification factor	6

Capacitances

Specifications of 6JQ6 — Capacitances
Input	13 pF
Grid–plate	0.32 pF
Output	6 pF

Charactereditorial reading, not a measurement

Specifications of 6JQ6 — Character
Gain	6%
Power	25%
Drive	90%
Linearity	95%

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

Using this tube

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Sources

By Jean-Michel Falligan DevergneReviewed May 29, 2026Source : electrontubestore 6JQ6 beam tetrodeActive model : Koren pentode

Manufacturer datasheets

1 manufacturer datasheets cross-checked for 6JQ61 verified

Triode-connectedRCA9-67 (sept 1967)

µ: 1

6JQ6 DatasheetLocal mirror · PDF

SPICE models

Revision and verification status

Source: electrontubestore 6JQ6 beam tetrode
Reviewed: 2026-05-29
Status: DataModelCalc
Model: Koren pentode

Context

The 6JQ6 is a indirectly-heated beam tetrode from RCA, introduced around 1962. It provides a gain factor (μ) of 6 with 10.5kΩ plate resistance. Commonly used in power applications. Compact sweep output.

History

Introduced: 1962
Manufacturer: RCA
Era: Late Production

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