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Tube Tinker — Electron Tube Database

Tube cross-reference

6CG8 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the 6CG8 voltage radio detector converter. Compare core specifications and verify every restriction before using a replacement.

Replacement tubes for 6CG8

The following tubes are recorded as possible replacements for 6CG8. This direction does not establish that 6CG8 can replace them.

6AT8

Voltage Radio Detector Converter

Receiving Tubes

The database records 6AT8 as a possible replacement for6CG8.

  • Not suitable for all circuits
SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
BaseNot recorded9DW
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.45 A0.45 A
6AT8A

Voltage Radio Detector Converter

Receiving Tubes

The database records 6AT8A as a possible replacement for6CG8.

  • Not suitable for all circuits
SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
BaseNot recorded9DW
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.45 A0.45 A
6BE8

Voltage Triode Pentode

Receiving Tubes

The database records 6BE8 as a possible replacement for6CG8.

  • Not suitable for all circuits
SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
BaseNot recordedNot recorded
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.45 A0.45 A
6BE8A

Voltage Triode Pentode

Receiving Tubes

The database records 6BE8A as a possible replacement for6CG8.

  • Not suitable for all circuits
SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
BaseNot recordedNot recorded
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.45 A0.45 A
6BR8

Voltage Radio Detector Converter

Receiving Tubes

The database records 6BR8 as a possible replacement for6CG8.

  • Not suitable for all circuits
SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
BaseNot recordedNot recorded
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.45 A0.45 A
6BR8A

Voltage Radio Detector Converter

Receiving Tubes

The database records 6BR8A as a possible replacement for6CG8.

  • Not suitable for all circuits
SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
BaseNot recorded9FA
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.45 A0.45 A
6CG8A

Voltage Radio Detector Converter

Receiving Tubes

The database records 6CG8A as a possible replacement for6CG8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
BaseNot recorded9GF
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.45 A0.45 A
6FG7

Voltage Radio Detector Converter

Receiving Tubes

The database records 6FG7 as a possible replacement for6CG8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
BaseNot recorded9GF
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.45 A0.45 A
6FV8

Voltage Triode Pentode

Receiving Tubes

The database records 6FV8 as a possible replacement for6CG8.

  • Not suitable for all circuits
SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
BaseNot recorded9FA
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.45 A0.45 A
6FV8A

Voltage Radio Detector Converter

Receiving Tubes

The database records 6FV8A as a possible replacement for6CG8.

  • Not suitable for all circuits
SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
BaseNot recorded9FA
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.45 A0.45 A

Where 6CG8 can be used as the replacement

In these recorded relationships, 6CG8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6CG8.

6AT8

Voltage Radio Detector Converter

Receiving Tubes

The database records 6CG8 as a possible replacement for6AT8.

  • Not suitable for all circuits
Specification6CG8 replacementOriginal tube
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
BaseNot recorded9DW
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.45 A0.45 A
6CG8A

Voltage Radio Detector Converter

Receiving Tubes

The database records 6CG8 as a possible replacement for6CG8A.

  • Parallel heater circuits only
  • No-warmup series circuits only
Specification6CG8 replacementOriginal tube
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
BaseNot recorded9GF
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.45 A0.45 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 6CG8 specifications →