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Tube Tinker — Electron Tube Database

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ECF86 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the ECF86 voltage triode pentode. Compare core specifications and verify every restriction before using a replacement.

Exact variations of ECF86

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.

  • 6HG8

    Voltage Radio Detector Converter

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

Replacement tubes for ECF86

The following tubes are recorded as possible replacements for ECF86. This direction does not establish that ECF86 can replace them.

6HG8

Voltage Radio Detector Converter

American To Foreign

The database records 6HG8 as a possible replacement forECF86.

No special restrictions are recorded for this substitution.

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

Where ECF86 can be used as the replacement

In these recorded relationships, ECF86 is the replacement tube. The listed original tubes are not automatically suitable as replacements for ECF86.

6HG8

Voltage Radio Detector Converter

Foreign To American

The database records ECF86 as a possible replacement for6HG8.

No special restrictions are recorded for this substitution.

SpecificationECF86 replacementOriginal tube
Tube typeVoltage Triode PentodeVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
Base9MP9MP
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.39 A0.34 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 ECF86 specifications →