What is the 7044 vacuum tube?

The 7044 is a triode vacuum tube designed for driver / preamp applications. Industrial computer dual triode. 5687 family..

What is a 7044 substitute or equivalent?

Direct equivalents to the 7044 include 5687, 6900. 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 7044?

Amplification factor μ ≈ 21, transconductance gm ≈ 12 mA/V, plate resistance rp ≈ 1.8 kΩ, max plate voltage 300 V, max plate dissipation 4.5 W, heater 12.6 V / 0.45 A.

Is the 7044 still in production?

Production status varies by year and manufacturer. The current Amperatubes catalog classifies the 7044 as Moderate 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 7044 sound like?

Industrial computer dual triode. 5687 family.. 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

←7044

← 7027A 7119 →Compare → 5687

7044 Triode Vacuum Tube

Dual triode12.6V / 0.45A9-pin Noval

SourceGE 7044 datasheet (tubebooks)Reviewed2026-05-29StatusDataModelCalcModelunder reviewPDF

Medium-gain triode for driver and line stage applications

Datasheet ↗

7044 — Sylvania — triode vacuum tube — (1958)

1.8kΩ

12.0mA/V

4.8pF

6.0pF

0.65pF

GAIN21%

POWER11%

DRIVE98%

LINEARITY90%

SPECIFICATIONS

Heater12.6 V · 0.45 A

Max Plate Voltage300 V

Pa max4.5 W

Gain Factor21

gm12 mA/V

rp1.8 kΩ

Inter-electrode capacitances

Cgk4.8 pF

Cgp6 pF

Cpk0.65 pF

Pinout9-pin Noval

Era1958

RarityModerate

HEATER12.6V / 0.45A

MAX PLATE300V / 4.5W

BASEnoval

SECTIONS2 (dual)

Source datasheets

4 manufacturer datasheets cross-checked for 7044

4 verified

EXECUTIVE SUMMARY

The 7044 is a dual indirectly-heated triode from Sylvania, introduced around 1958. It provides a gain factor (μ) of 21 with 1750Ω plate resistance. Commonly used in driver / preamp applications. Industrial computer dual triode. 5687 family.

APPLICATIONS

Voltage amplifierHeadphone outputPhase splitter

Generic triode driver / preamp stage

• Hi-Fi stereo• Headphone amp

VS 5687

μ +31%Rp -42%Pd +7%Full comparison →

HISTORY

Introduced1958ManufacturerSylvania

Golden Age

7044 Datasheet

Local mirror · PDF

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METRIX TESTER

Test this tube on a Metrix

SPICE model not yet available. Loadline calculator requires calibrated Koren parameters.

SIMILAR TRIODES

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