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Tube Tinker — Electron Tube Database

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17D4 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the 17D4 rectifier - damper diode. Compare core specifications and verify every restriction before using a replacement.

Exact variations of 17D4

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.

  • 17DM4

    Rectifier - Damper Diode

    Base
    4CG
    Socket
    IO
    Base pins
    9
    Sections
    1
    Heater voltage
    16.8 V
    Heater current
    0.3 A

Replacement tubes for 17D4

The following tubes are recorded as possible replacements for 17D4. This direction does not establish that 17D4 can replace them.

17AX4GTA

Rectifier - Damper Diode

Receiving Tubes

The database records 17AX4GTA as a possible replacement for17D4.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeRectifier - Damper DiodeRectifier - Damper Diode
ConstructionRectifierRectifier
BaseNot recorded4CG
SocketB7GIO
Base pins58
Sections11
Heater voltage16.8 V16.8 V
Heater current0.45 A0.45 A
17D4A

Rectifier - Damper Diode

Receiving Tubes

The database records 17D4A as a possible replacement for17D4.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeRectifier - Damper DiodeRectifier - Damper Diode
ConstructionRectifierRectifier
BaseNot recordedNot recorded
SocketB7GB7G
Base pins59
Sections11
Heater voltage16.8 V16.8 V
Heater current0.45 A0.3 A
17DM4

Rectifier - Damper Diode

Receiving Tubes

The database records 17DM4 as a possible replacement for17D4.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeRectifier - Damper DiodeRectifier - Damper Diode
ConstructionRectifierRectifier
BaseNot recorded4CG
SocketB7GIO
Base pins59
Sections11
Heater voltage16.8 V16.8 V
Heater current0.45 A0.3 A
17DM4A

Rectifier - Damper Diode

Receiving Tubes

The database records 17DM4A as a possible replacement for17D4.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeRectifier - Damper DiodeRectifier - Damper Diode
ConstructionRectifierRectifier
BaseNot recorded4CG
SocketB7GIO
Base pins59
Sections11
Heater voltage16.8 V16.8 V
Heater current0.45 A0.45 A

Where 17D4 can be used as the replacement

In these recorded relationships, 17D4 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 17D4.

17AX4GT

Rectifier - Damper Diode

Receiving Tubes

The database records 17D4 as a possible replacement for17AX4GT.

No special restrictions are recorded for this substitution.

Specification17D4 replacementOriginal tube
Tube typeRectifier - Damper DiodeRectifier - Damper Diode
ConstructionRectifierRectifier
BaseNot recorded4CG
SocketB7GIO
Base pins56
Sections11
Heater voltage16.8 V16.8 V
Heater current0.45 A0.45 A
17AX4GTA

Rectifier - Damper Diode

Receiving Tubes

The database records 17D4 as a possible replacement for17AX4GTA.

No special restrictions are recorded for this substitution.

Specification17D4 replacementOriginal tube
Tube typeRectifier - Damper DiodeRectifier - Damper Diode
ConstructionRectifierRectifier
BaseNot recorded4CG
SocketB7GIO
Base pins58
Sections11
Heater voltage16.8 V16.8 V
Heater current0.45 A0.45 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 17D4 specifications →