What is the 6S19P vacuum tube?

The 6S19P is a triode vacuum tube designed for otl / regulator applications. Russian power triode..

What is a 6S19P substitute or equivalent?

Direct equivalents to the 6S19P include None. 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 6S19P?

Amplification factor μ ≈ 2.4, transconductance gm ≈ 7.5 mA/V, plate resistance rp ≈ 400 Ω, max plate voltage 200 V, max plate dissipation 11 W, heater 6.3 V / 1 A.

Is the 6S19P still in production?

Production status varies by year and manufacturer. The current Amperatubes catalog classifies the 6S19P 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 6S19P sound like?

Russian power triode.. 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

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6S19P Triode Vacuum Tube

Triode6.3V / 1A9-pin Noval

SourceSoviet-Tubes 6С19П datasheetReviewed2026-05-29StatusDataModelCalcModelunder reviewPDF

High-power directly-heated triode for single-ended amplification

Datasheet ↗

6S19P — Russian — triode vacuum tube — (1970)

2.4

400Ω

7.5mA/V

6.5pF

8.0pF

2.50pF

GAIN2%

POWER28%

DRIVE100%

LINEARITY95%

SPECIFICATIONS

Heater6.3 V · 1 A

Max Plate Voltage200 V

Pa max11 W

Gain Factor2.4

gm7.5 mA/V

rp400 Ω

Inter-electrode capacitances

Cgk6.5 pF

Cgp8 pF

Cpk2.5 pF

Pinout9-pin Noval

Era1970

RarityCommon

HEATER6.3V / 1A

MAX PLATE200V / 11W

BASEnoval

Source datasheets

1 manufacturer datasheets cross-checked for 6S19P

1 verified

EXECUTIVE SUMMARY

The 6S19P is a indirectly-heated triode from Russian, introduced around 1970. It provides a gain factor (μ) of 2.4 with 400Ω plate resistance. Commonly used in otl / regulator applications. Russian power triode.

APPLICATIONS

SET outputPush-pull outputHeadphone output

Generic triode otl / regulator stage

• Headphone amp

HISTORY

Introduced1970ManufacturerRussian

Late Production

6S19P 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.

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