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Tube Tinker — Electron Tube Database

Tube cross-reference

8GJ7 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the 8GJ7 specialized - ignitron. Compare core specifications and verify every restriction before using a replacement.

Exact variations of 8GJ7

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.

  • PCF801

    Voltage Radio Detector Converter

    Base
    9QA
    Socket
    B9A
    Base pins
    9
    Sections
    2
    Heater voltage
    8.5 V
    Heater current
    0.3 A

Replacement tubes for 8GJ7

The following tubes are recorded as possible replacements for 8GJ7. This direction does not establish that 8GJ7 can replace them.

PCF801

Voltage Radio Detector Converter

Foreign To American

The database records PCF801 as a possible replacement for8GJ7.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeSpecialized - IgnitronVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
Base9QA9QA
SocketB9AB9A
Base pins99
Sections22
Heater voltage8.6 V8.5 V
Heater current0.3 A0.3 A
PCF806

Voltage Triode Pentode

Foreign To American

The database records PCF806 as a possible replacement for8GJ7.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeSpecialized - IgnitronVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
Base9QAB9A
SocketB9AB9A
Base pins99
Sections22
Heater voltage8.6 V8 V
Heater current0.3 A0.3 A
8GX7

Voltage Radio Detector Converter

Receiving Tubes

The database records 8GX7 as a possible replacement for8GJ7.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeSpecialized - IgnitronVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
Base9QANot recorded
SocketB9AB9A
Base pins99
Sections22
Heater voltage8.6 V7.7 V
Heater current0.3 A0.3 A

Where 8GJ7 can be used as the replacement

In these recorded relationships, 8GJ7 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 8GJ7.

PCF801

Voltage Radio Detector Converter

American To Foreign

The database records 8GJ7 as a possible replacement forPCF801.

No special restrictions are recorded for this substitution.

Specification8GJ7 replacementOriginal tube
Tube typeSpecialized - IgnitronVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
Base9QA9QA
SocketB9AB9A
Base pins99
Sections22
Heater voltage8.6 V8.5 V
Heater current0.3 A0.3 A
PCF806

Voltage Triode Pentode

American To Foreign

The database records 8GJ7 as a possible replacement forPCF806.

No special restrictions are recorded for this substitution.

Specification8GJ7 replacementOriginal tube
Tube typeSpecialized - IgnitronVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
Base9QAB9A
SocketB9AB9A
Base pins99
Sections22
Heater voltage8.6 V8 V
Heater current0.3 A0.3 A
8GX7

Voltage Radio Detector Converter

Receiving Tubes

The database records 8GJ7 as a possible replacement for8GX7.

No special restrictions are recorded for this substitution.

Specification8GJ7 replacementOriginal tube
Tube typeSpecialized - IgnitronVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
Base9QANot recorded
SocketB9AB9A
Base pins99
Sections22
Heater voltage8.6 V7.7 V
Heater current0.3 A0.3 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 8GJ7 specifications →