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Tube Tinker — Electron Tube Database

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6AD8 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the 6AD8 voltage radio detector converter. Compare core specifications and verify every restriction before using a replacement.

Exact variations of 6AD8

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.

  • 6DC8

    Voltage Radio Detector Converter

    Base
    Not recorded
    Socket
    B9A
    Base pins
    9
    Sections
    3
    Heater voltage
    6.3 V
    Heater current
    0.3 A
  • EBF89

    Voltage Radio Detector Converter

    Base
    NOVAL
    Socket
    B9A
    Base pins
    9
    Sections
    3
    Heater voltage
    6.3 V
    Heater current
    0.3 A

Replacement tubes for 6AD8

The following tubes are recorded as possible replacements for 6AD8. This direction does not establish that 6AD8 can replace them.

6FD12

Voltage Radio Detector Converter

Foreign To American

The database records 6FD12 as a possible replacement for6AD8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionDiode-Diode-PentodeDiode-Diode-Pentode
Base9TNot recorded
SocketB9AB9A
Base pinsNot recorded9
Sections33
Heater voltage6.3 V6.3 V
Heater current0.3 A0.3 A
EBF80

Voltage Radio Detector Converter

Foreign To American

The database records EBF80 as a possible replacement for6AD8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionDiode-Diode-PentodeDiode-Diode-Pentode
Base9TNOVAL
SocketB9AB9A
Base pinsNot recorded9
Sections33
Heater voltage6.3 V6.3 V
Heater current0.3 A0.3 A
EBF89

Voltage Radio Detector Converter

Foreign To American

The database records EBF89 as a possible replacement for6AD8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionDiode-Diode-PentodeDiode-Diode-Pentode
Base9TNOVAL
SocketB9AB9A
Base pinsNot recorded9
Sections33
Heater voltage6.3 V6.3 V
Heater current0.3 A0.3 A
6DC8

Voltage Radio Detector Converter

Receiving Tubes

The database records 6DC8 as a possible replacement for6AD8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionDiode-Diode-PentodeDiode-Diode-Pentode
Base9TNot recorded
SocketB9AB9A
Base pinsNot recorded9
Sections33
Heater voltage6.3 V6.3 V
Heater current0.3 A0.3 A
6N8

Voltage Radio Detector Converter

Receiving Tubes

The database records 6N8 as a possible replacement for6AD8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionDiode-Diode-PentodeDiode-Diode-Pentode
Base9T9T
SocketB9AB9A
Base pinsNot recorded9
Sections33
Heater voltage6.3 V6.3 V
Heater current0.3 A0.3 A

Where 6AD8 can be used as the replacement

In these recorded relationships, 6AD8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6AD8.

6DC8

Voltage Radio Detector Converter

Receiving Tubes

The database records 6AD8 as a possible replacement for6DC8.

No special restrictions are recorded for this substitution.

Specification6AD8 replacementOriginal tube
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionDiode-Diode-PentodeDiode-Diode-Pentode
Base9TNot recorded
SocketB9AB9A
Base pinsNot recorded9
Sections33
Heater voltage6.3 V6.3 V
Heater current0.3 A0.3 A
6N8

Voltage Radio Detector Converter

Receiving Tubes

The database records 6AD8 as a possible replacement for6N8.

No special restrictions are recorded for this substitution.

Specification6AD8 replacementOriginal tube
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionDiode-Diode-PentodeDiode-Diode-Pentode
Base9T9T
SocketB9AB9A
Base pinsNot recorded9
Sections33
Heater voltage6.3 V6.3 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 6AD8 specifications →