What is a 6P30B substitute or equivalent?

Direct equivalents to the 6P30B include None standard. 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 6P30B?

Transconductance gm ≈ 4.45 mA/V, max plate voltage 250 V, max plate dissipation 5.5 W, heater 6.3 V / 0.395 A.

Is the 6P30B still in production?

Production status varies by year and manufacturer. The current Amperatubes catalog classifies the 6P30B 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 6P30B sound like?

Soviet subminiature beam-power tetrode for compact transmitter / amplifier output stages. Flying-lead 8-pin construction (no socket).. 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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6P30B 6P30B / 6П30Б Pentode Vacuum Tube

Q: What is the 6P30B vacuum tube?

The 6P30B (6P30B / 6П30Б) is a pentode vacuum tube designed for power (output) applications. Soviet subminiature beam-power tetrode for compact transmitter / amplifier output stages. Flying-lead 8-pin construction (no socket)..

Pentode6.3V / 0.395A8-pin Submini (flying leads)SPICE

SourceRussian 6П30Б datasheetReviewed2026-05-29StatusDataModelCalcModelKoren pentodePDF

Small-signal pentode for low-noise voltage amplification

Datasheet ↗SPICE

6P30B / 6П30Б — Russian — pentode vacuum tube — (1965)

4.5mA/V

12.0pF

0.6pF

4.20pF

GAIN0%

POWER14%

DRIVE50%

LINEARITY75%

SPECIFICATIONS

Heater6.3 V · 0.395 A

Max Plate Voltage250 V

Pa max5.5 W

Gain Factor—

gm4.45 mA/V

rp—

Inter-electrode capacitances

Cgk12 pF

Cgp0.6 pF

Cpk4.2 pF

Pinout8-pin Submini (flying leads)

Era1965

RarityCommon

HEATER6.3V / 0.395A

MAX PLATE250V / 5.5W

BASEsubmini-8

Source datasheets

1 manufacturer datasheets cross-checked for 6P30B / 6П30Б

1 verified

EXECUTIVE SUMMARY

The 6P30B is a indirectly-heated pentode from Russian, introduced around 1965. Commonly used in power (output) applications. Soviet subminiature beam-power tetrode for compact transmitter / amplifier output stages. Flying-lead 8-pin construction (no socket).

HISTORY

Introduced1965ManufacturerRussian

Late Production

6P30B Datasheet

Frank's Electron Tube Pages · PDF

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METRIX TESTER

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