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.

By Jean-Michel Falligan Devergne · Reviewed May 29, 2026

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6P1P-EV 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..

Tetrode6.3V / 0.5A9-pin NovalSPICE

SourceRussian 6П1П-ЕВ datasheet · Reddit /r/diytubes feedbackReviewed2026-05-29StatusDataModelCalcModelKoren pentodePDF

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

Datasheet ↗SPICE

6P1P-EV / 6П1П-ЕВ — Russian (long-life ЕВ grade) — tetrode vacuum tube — (1965)

42.5kΩ

4.9mA/V

7.5pF

0.8pF

4.50pF

GAIN0%

POWER30%

DRIVE58%

LINEARITY75%

SPECIFICATIONS

Heater6.3 V · 0.5 A

Max Plate Voltage250 V

Pa max12 W

Gain Factor—

gm4.9 mA/V

rp42.5 kΩ

Inter-electrode capacitances

Cgk7.5 pF

Cgp0.8 pF

Cpk4.5 pF

Pinout9-pin Noval

Era1965

RarityCommon

HEATER6.3V / 0.5A

MAX PLATE250V / 12W

BASEnoval

Source datasheets

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

2 verified

EXECUTIVE SUMMARY

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

Introduced1965ManufacturerRussian (long-life ЕВ grade)

Late Production

6P1P-EV Datasheet

Frank's Electron Tube Pages · PDF

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METRIX TESTER

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