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Tube Tinker — Electron Tube Database

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6BN8 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the 6BN8 voltage - triode (with diode, heptode or hexode). Compare core specifications and verify every restriction before using a replacement.

Replacement tubes for 6BN8

The following tubes are recorded as possible replacements for 6BN8. This direction does not establish that 6BN8 can replace them.

6BJ8

Voltage - Triode (with diode, heptode or hexode)

Receiving Tubes

The database records 6BJ8 as a possible replacement for6BN8.

  • Not suitable for all circuits
SpecificationOriginal tubeReplacement
Tube typeVoltage - Triode (with diode, heptode or hexode)Voltage - Triode (with diode, heptode or hexode)
ConstructionDiode-Diode-TriodeDiode-Diode-Triode
Base9ERNot recorded
SocketB9AB9A
Base pins99
Sections33
Heater voltage6.3 V6.3 V
Heater current0.6 A0.6 A

Where 6BN8 can be used as the replacement

In these recorded relationships, 6BN8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6BN8.

6BJ8

Voltage - Triode (with diode, heptode or hexode)

Receiving Tubes

The database records 6BN8 as a possible replacement for6BJ8.

  • Not suitable for all circuits
Specification6BN8 replacementOriginal tube
Tube typeVoltage - Triode (with diode, heptode or hexode)Voltage - Triode (with diode, heptode or hexode)
ConstructionDiode-Diode-TriodeDiode-Diode-Triode
Base9ERNot recorded
SocketB9AB9A
Base pins99
Sections33
Heater voltage6.3 V6.3 V
Heater current0.6 A0.6 A

Verify before substituting

Matching a base or heater voltage is not enough to prove that two tubes are interchangeable. Check pin connections, heater current, maximum ratings, bias requirements, warm-up behavior, and the equipment manufacturer’s service documentation before making a substitution.

View the complete 6BN8 specifications →