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.

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)..

Small-signal pentode for low-noise voltage amplification

PentodeHeater 6.3 V · 0.395 A8-pin Submini (flying leads)Russian 1965

Plate dissipation: 5.5W
Max plate voltage: 250V
Max screen voltage: 120V
Max cathode current: 60mA
Transconductance: 4.45mA/V

6P30B

Characteristics

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

HeaterIndirectly heated

Specifications of 6P30B — Heater
Heater voltageVh	6.3 V
Heater currentIh	0.395 A

Limiting valuesDatasheet maximum ratings — not to be exceeded

Specifications of 6P30B — Limiting values
Plate voltageVa max	250 V
Screen voltageVg2 max	120 V
Plate dissipationPa max	5.5 W
Screen dissipationPg2 max	2 W
Cathode currentIk max	60 mA
Grid resistorRg1 max	1 MΩ

Mechanical

Specifications of 6P30B — Mechanical
Base	8-pin Submini (flying leads)
Rarity	Common
Pinout

Small signalDatasheet parameters at the reference operating point — not limits

Specifications of 6P30B — Small signal
Transconductance	4.45 mA/V

Capacitances

Specifications of 6P30B — Capacitances
Input	12 pF
Grid–plate	0.6 pF
Output	4.2 pF

Charactereditorial reading, not a measurement

Specifications of 6P30B — Character
Gain	0%
Power	14%
Drive	50%
Linearity	75%

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

Using this tube

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Sources

By Jean-Michel Falligan DevergneReviewed May 29, 2026Source : Russian 6П30Б datasheetActive model : Koren pentode

Manufacturer datasheets

1 manufacturer datasheets cross-checked for 6P30B / 6П30Б1 verified

6P30B DatasheetFrank's Electron Tube Pages · PDF

SPICE models

Revision and verification status

Source: Russian 6П30Б datasheet
Reviewed: 2026-05-29
Status: DataModelCalc
Model: Koren pentode

Context

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

Introduced: 1965
Manufacturer: Russian
Era: Late Production

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