Skip to main content
Tube Tinker — Electron Tube Database

Tube cross-reference

6GJ7 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the 6GJ7 voltage radio detector converter. Compare core specifications and verify every restriction before using a replacement.

Exact variations of 6GJ7

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.

  • ECF801

    Voltage Triode Pentode

    Base
    9QA
    Socket
    B9A
    Base pins
    9
    Sections
    2
    Heater voltage
    6.3 V
    Heater current
    0.41 A

Replacement tubes for 6GJ7

The following tubes are recorded as possible replacements for 6GJ7. This direction does not establish that 6GJ7 can replace them.

ECF801

Voltage Triode Pentode

Foreign To American

The database records ECF801 as a possible replacement for6GJ7.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
Base9QA9QA
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.45 A0.41 A

Where 6GJ7 can be used as the replacement

In these recorded relationships, 6GJ7 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6GJ7.

ECF801

Voltage Triode Pentode

American To Foreign

The database records 6GJ7 as a possible replacement forECF801.

No special restrictions are recorded for this substitution.

Specification6GJ7 replacementOriginal tube
Tube typeVoltage Radio Detector ConverterVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
Base9QA9QA
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.45 A0.41 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 6GJ7 specifications →