What is the 8298A vacuum tube?

The 8298A is a tetrode vacuum tube designed for power (pp) applications. Enhanced EL34 type..

What is a 8298A substitute or equivalent?

Direct equivalents to the 8298A include 6146B. 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 8298A?

Transconductance gm ≈ 10 mA/V, max plate voltage 800 V, max plate dissipation 35 W, heater 6.3 V / 1.25 A.

Is the 8298A still in production?

Production status varies by year and manufacturer. The current Amperatubes catalog classifies the 8298A as Sought-after 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 8298A sound like?

Enhanced EL34 type.. 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 9, 2026

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8298A Tetrode Vacuum Tube

Tetrode6.3V / 1.25AOctalSPICE

Sourceamplifiedparts 6146B/8298A beam powerReviewed2026-05-09StatusDataModelCalcModelKoren pentodePDF

Beam power tetrode rated at 35W for high-power output stages

Datasheet ↗SPICE

8298A — GE — tetrode vacuum tube — (1960)

10.0mA/V

11.0pF

0.7pF

8.50pF

GAIN0%

POWER88%

DRIVE50%

LINEARITY75%

SPECIFICATIONS

Heater6.3 V · 1.25 A

Max Plate Voltage800 V

Pa max35 W

Gain Factor—

gm10 mA/V

rp—

Inter-electrode capacitances

Cgk11 pF

Cgp0.7 pF

Cpk8.5 pF

PinoutOctal

Era1960

RaritySought-after

HEATER6.3V / 1.25A

MAX PLATE800V / 35W

BASEoctal

EXECUTIVE SUMMARY

The 8298A is a indirectly-heated beam tetrode from GE, introduced around 1960. Commonly used in power (pp) applications. Enhanced EL34 type.

APPLICATIONS

High-power output

Generic tetrode power (pp) stage

• PA/public address

HISTORY

Introduced1960ManufacturerGE

Late Production

8298A Datasheet

Local mirror · PDF

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METRIX TESTER

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