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Tube Tinker — Electron Tube Database

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6HG8 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the 6HG8 voltage radio detector converter. Compare core specifications and verify every restriction before using a replacement.

Exact variations of 6HG8

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.

  • ECF86

    Voltage Triode Pentode

    Base
    9MP
    Socket
    B9A
    Base pins
    9
    Sections
    2
    Heater voltage
    6.3 V
    Heater current
    0.39 A

Replacement tubes for 6HG8

The following tubes are recorded as possible replacements for 6HG8. This direction does not establish that 6HG8 can replace them.

ECF86

Voltage Triode Pentode

Foreign To American

The database records ECF86 as a possible replacement for6HG8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
Base9MP9MP
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.34 A0.39 A

Where 6HG8 can be used as the replacement

In these recorded relationships, 6HG8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6HG8.

ECF86

Voltage Triode Pentode

American To Foreign

The database records 6HG8 as a possible replacement forECF86.

No special restrictions are recorded for this substitution.

Specification6HG8 replacementOriginal tube
Tube typeVoltage Radio Detector ConverterVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
Base9MP9MP
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.34 A0.39 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 6HG8 specifications →