What is the 6S19P vacuum tube?

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

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.

6S19P Triode Vacuum Tube

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

TriodeHeater 6.3 V · 1 A9-pin NovalRussian 1970

Plate dissipation: 11W
Max plate voltage: 200V
Transconductance: 7.5mA/V

6S19P

Characteristics

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

HeaterIndirectly heated

Specifications of 6S19P — Heater
Heater voltageVh	6.3 V
Heater currentIh	1 A

Limiting valuesDatasheet maximum ratings — not to be exceeded

Specifications of 6S19P — Limiting values
Plate voltageVa max	200 V
Plate dissipationPa max	11 W

Mechanical

Specifications of 6S19P — Mechanical
Base	9-pin Noval
Rarity	Common
Pinout

Small signalDatasheet parameters at the reference operating point — not limits

Specifications of 6S19P — Small signal
Transconductance	7.5 mA/V
Plate resistance	400 Ω
Amplification factor	2.4

Capacitances

Specifications of 6S19P — Capacitances
Grid–cathode	6.5 pF
Grid–plate	8 pF
Plate–cathode	2.5 pF

Charactereditorial reading, not a measurement

Specifications of 6S19P — Character
Gain	2%
Power	28%
Drive	100%
Linearity	95%

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

Using this tube

No interactive loadline model for this tube yet — download a SPICE model below to simulate it in LTspice or ngspice.

Applications

SET output
Push-pull output
Headphone output

Generic triode otl / regulator stage

Headphone amp

Replace or compare

Sources

By Jean-Michel Falligan DevergneReviewed May 29, 2026Source : Soviet-Tubes 6С19П datasheet

Manufacturer datasheets

1 manufacturer datasheets cross-checked for 6S19P1 verified

6S19P DatasheetLocal mirror · PDF

SPICE models

Revision and verification status

Source: Soviet-Tubes 6С19П datasheet
Reviewed: 2026-05-29
Status: DataModelCalc
Model: under review

Context

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.

History

Introduced: 1970
Manufacturer: Russian
Era: Late Production

METRIX TESTER