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Tube Tinker — Electron Tube Database

Tube cross-reference

879 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the 879 rectifier - half wave. Compare core specifications and verify every restriction before using a replacement.

Exact variations of 879

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.

  • 2X2

    Rectifier - Half Wave

    Base
    4P
    Socket
    Not recorded
    Base pins
    7
    Sections
    1
    Heater voltage
    2.5 V
    Heater current
    1.75 A
  • VT119

    NEW (being researched)

    Base
    Not recorded
    Socket
    Not recorded
    Base pins
    Not recorded
    Sections
    1
    Heater voltage
    Not recorded
    Heater current
    Not recorded

Replacement tubes for 879

The following tubes are recorded as possible replacements for 879. This direction does not establish that 879 can replace them.

2X2

Rectifier - Half Wave

Communications And Special Purpose Tubes

The database records 2X2 as a possible replacement for879.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeRectifier - Half WaveRectifier - Half Wave
ConstructionRectifierRectifier
Base4P4P
SocketSMALL4Not recorded
Base pins47
Sections11
Heater voltage2.5 V2.5 V
Heater current1.75 A1.75 A

Where 879 can be used as the replacement

In these recorded relationships, 879 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 879.

2X2

Rectifier - Half Wave

Receiving To Industrial Tubes

The database records 879 as a possible replacement for2X2.

No special restrictions are recorded for this substitution.

Specification879 replacementOriginal tube
Tube typeRectifier - Half WaveRectifier - Half Wave
ConstructionRectifierRectifier
Base4P4P
SocketSMALL4Not recorded
Base pins47
Sections11
Heater voltage2.5 V2.5 V
Heater current1.75 A1.75 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 879 specifications →