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Tube Tinker — Electron Tube Database

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6Y9 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the 6Y9 voltage dual pentode. Compare core specifications and verify every restriction before using a replacement.

Exact variations of 6Y9

These designations belong to the same electrical variation group. Their names may differ because of international standards, manufacturing tolerances, or materials, but they are recorded as electrically equivalent—not merely substitutes.

  • EFL200

    Voltage Dual Pentode

    Base
    Not recorded
    Socket
    B10B
    Base pins
    10
    Sections
    2
    Heater voltage
    6.3 V
    Heater current
    0.81 A

Replacement tubes for 6Y9

The following tubes are recorded as possible replacements for 6Y9. This direction does not establish that 6Y9 can replace them.

EFL200

Voltage Dual Pentode

Foreign To American

The database records EFL200 as a possible replacement for6Y9.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Dual PentodeVoltage Dual Pentode
ConstructionPentode-PentodePentode-Pentode
BaseNot recordedNot recorded
SocketNot recordedB10B
Base pins1010
Sections22
Heater voltage6.3 V6.3 V
Heater current0.8 A0.81 A

Where 6Y9 can be used as the replacement

In these recorded relationships, 6Y9 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6Y9.

EFL200

Voltage Dual Pentode

American To Foreign

The database records 6Y9 as a possible replacement forEFL200.

No special restrictions are recorded for this substitution.

Specification6Y9 replacementOriginal tube
Tube typeVoltage Dual PentodeVoltage Dual Pentode
ConstructionPentode-PentodePentode-Pentode
BaseNot recordedNot recorded
SocketNot recordedB10B
Base pins1010
Sections22
Heater voltage6.3 V6.3 V
Heater current0.8 A0.81 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 6Y9 specifications →