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Tube Tinker — Electron Tube Database

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9A8 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the 9A8 voltage radio detector converter. Compare core specifications and verify every restriction before using a replacement.

Exact variations of 9A8

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.

  • 8A8

    Voltage Triode Pentode

    Base
    Not recorded
    Socket
    Not recorded
    Base pins
    Not recorded
    Sections
    2
    Heater voltage
    8.4 V
    Heater current
    0.3 A
  • PCF80

    Voltage Radio Detector Converter

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

Replacement tubes for 9A8

The following tubes are recorded as possible replacements for 9A8. This direction does not establish that 9A8 can replace them.

30C1

Voltage Radio Detector Converter

Foreign To American

The database records 30C1 as a possible replacement for9A8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
Base7AEB9A
SocketB9AB9A
Base pins99
Sections22
Heater voltage9 V9 V
Heater current0.3 A0.3 A
LZ319

Voltage Triode Pentode

Foreign To American

The database records LZ319 as a possible replacement for9A8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
Base7AEB9A
SocketB9AB9A
Base pins99
Sections22
Heater voltage9 V9 V
Heater current0.3 A0.3 A
PCF80

Voltage Radio Detector Converter

Foreign To American

The database records PCF80 as a possible replacement for9A8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
Base7AEB9A
SocketB9AB9A
Base pins99
Sections22
Heater voltage9 V9 V
Heater current0.3 A0.3 A
9U8

Voltage Radio Detector Converter

Receiving Tubes

The database records 9U8 as a possible replacement for9A8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
Base7AE9AE
SocketB9AB9A
Base pins99
Sections22
Heater voltage9 V9 V
Heater current0.3 A0.3 A
9U8A

Voltage Radio Detector Converter

Receiving Tubes

The database records 9U8A as a possible replacement for9A8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
Base7AE9AE
SocketB9AB9A
Base pins99
Sections22
Heater voltage9 V9.45 V
Heater current0.3 A0.3 A

Where 9A8 can be used as the replacement

In these recorded relationships, 9A8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 9A8.

30C1

Voltage Radio Detector Converter

American To Foreign

The database records 9A8 as a possible replacement for30C1.

No special restrictions are recorded for this substitution.

Specification9A8 replacementOriginal tube
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
Base7AEB9A
SocketB9AB9A
Base pins99
Sections22
Heater voltage9 V9 V
Heater current0.3 A0.3 A
LZ319

Voltage Triode Pentode

American To Foreign

The database records 9A8 as a possible replacement forLZ319.

No special restrictions are recorded for this substitution.

Specification9A8 replacementOriginal tube
Tube typeVoltage Radio Detector ConverterVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
Base7AEB9A
SocketB9AB9A
Base pins99
Sections22
Heater voltage9 V9 V
Heater current0.3 A0.3 A
PCF80

Voltage Radio Detector Converter

American To Foreign

The database records 9A8 as a possible replacement forPCF80.

No special restrictions are recorded for this substitution.

Specification9A8 replacementOriginal tube
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
Base7AEB9A
SocketB9AB9A
Base pins99
Sections22
Heater voltage9 V9 V
Heater current0.3 A0.3 A
9U8

Voltage Radio Detector Converter

Receiving Tubes

The database records 9A8 as a possible replacement for9U8.

No special restrictions are recorded for this substitution.

Specification9A8 replacementOriginal tube
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
Base7AE9AE
SocketB9AB9A
Base pins99
Sections22
Heater voltage9 V9 V
Heater current0.3 A0.3 A
9U8A

Voltage Radio Detector Converter

Receiving Tubes

The database records 9A8 as a possible replacement for9U8A.

  • No-warmup series circuits only
Specification9A8 replacementOriginal tube
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
Base7AE9AE
SocketB9AB9A
Base pins99
Sections22
Heater voltage9 V9.45 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 9A8 specifications →