What is a 6P1P-EV substitute or equivalent?

Direct equivalents to the 6P1P-EV include EL84 socket-compatible (noval 9-pin) but electrically a beam tetrode, not a true pentode — NOT a drop-in replacement. 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 6P1P-EV?

Transconductance gm ≈ 4.9 mA/V, plate resistance rp ≈ 42.5 kΩ, max plate voltage 250 V, max plate dissipation 12 W, heater 6.3 V / 0.5 A.

Is the 6P1P-EV still in production?

Production status varies by year and manufacturer. The current Amperatubes catalog classifies the 6P1P-EV 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.

6P1P-EV 6П1П-ЕВ Tetrode Vacuum Tube

Q: What is the 6P1P-EV vacuum tube?

The 6P1P-EV (6P1P-EV / 6П1П-ЕВ) is a tetrode vacuum tube designed for power (output) applications. Soviet beam-power tetrode in a 9-pin noval envelope. Mechanically socket-compatible with the EL84 (same noval base) but electrically a beam tetrode rather than a pentode — close in service to the EL84 / 6V6 / 6AQ5 family but NOT a drop-in equivalent. The ЕВ (EV) suffix denotes the long-life military-grade selection..

Also known as EL84 socket-compatible (noval 9-pin) but electrically a beam tetrode · not a true pentode — NOT a drop-in replacement

Beam power tetrode rated at 12W for high-power output stages

TetrodeHeater 6.3 V · 0.5 A9-pin NovalRussian (long-life ЕВ grade) 1965

Plate dissipation: 12W
Max plate voltage: 250V
Max screen voltage: 250V
Transconductance: 4.9mA/V

6P1P-EV

Characteristics

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

HeaterIndirectly heated

Specifications of 6P1P-EV — Heater
Heater voltageVh	6.3 V
Heater currentIh	0.5 A

Limiting valuesDatasheet maximum ratings — not to be exceeded

Specifications of 6P1P-EV — Limiting values
Plate voltageVa max	250 V
Screen voltageVg2 max	250 V
Plate dissipationPa max	12 W

Mechanical

Specifications of 6P1P-EV — Mechanical
Base	9-pin Noval
Rarity	Common
Pinout

Small signalDatasheet parameters at the reference operating point — not limits

Specifications of 6P1P-EV — Small signal
Transconductance	4.9 mA/V
Plate resistance	42.5 kΩ

Capacitances

Specifications of 6P1P-EV — Capacitances
Input	7.5 pF
Grid–plate	0.8 pF
Output	4.5 pF

Charactereditorial reading, not a measurement

Specifications of 6P1P-EV — Character
Gain	0%
Power	30%
Drive	58%
Linearity	75%

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

Using this tube

Replace or compare

Sources

By Jean-Michel Falligan DevergneReviewed May 29, 2026Source : Russian 6П1П-ЕВ datasheet · Reddit /r/diytubes feedbackActive model : Koren pentode

Manufacturer datasheets

2 manufacturer datasheets cross-checked for 6P1P-EV / 6П1П-ЕВ2 verified

6P1P-EV DatasheetFrank's Electron Tube Pages · PDF

SPICE models

Revision and verification status

Source: Russian 6П1П-ЕВ datasheet · Reddit /r/diytubes feedback
Reviewed: 2026-05-29
Status: DataModelCalc
Model: Koren pentode

Context

The 6P1P-EV is a indirectly-heated beam tetrode from Russian (long-life ЕВ grade), introduced around 1965. Commonly used in power (output) applications. Soviet beam-power tetrode in a 9-pin noval envelope. Mechanically socket-compatible with the EL84 (same noval base) but electrically a beam tetrode rather than a pentode — close in service to the EL84 / 6V6 / 6AQ5 family but NOT a drop-in equivalent. The ЕВ (EV) suffix denotes the long-life military-grade selection.

History

Introduced: 1965
Manufacturer: Russian (long-life ЕВ grade)
Era: Late Production

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