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Tube Tinker — Electron Tube Database

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7643 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the 7643 voltage radio detector converter. Compare core specifications and verify every restriction before using a replacement.

Exact variations of 7643

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.

  • E80CF

    Voltage Triode Pentode

    Base
    NOVAL
    Socket
    B9A
    Base pins
    9
    Sections
    2
    Heater voltage
    6.3 V
    Heater current
    0.33 A

Replacement tubes for 7643

The following tubes are recorded as possible replacements for 7643. This direction does not establish that 7643 can replace them.

E80CF

Voltage Triode Pentode

Foreign To American

The database records E80CF as a possible replacement for7643.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Radio Detector ConverterVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
BaseNot recordedNOVAL
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.33 A0.33 A

Where 7643 can be used as the replacement

In these recorded relationships, 7643 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 7643.

E80CF

Voltage Triode Pentode

American To Foreign

The database records 7643 as a possible replacement forE80CF.

No special restrictions are recorded for this substitution.

Specification7643 replacementOriginal tube
Tube typeVoltage Radio Detector ConverterVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
BaseNot recordedNOVAL
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.33 A0.33 A
6BL8

Voltage Radio Detector Converter

Receiving To Industrial Tubes

The database records 7643 as a possible replacement for6BL8.

  • Parallel heater circuits only
Specification7643 replacementOriginal tube
Tube typeVoltage Radio Detector ConverterVoltage Radio Detector Converter
ConstructionPentode-TriodePentode-Triode
BaseNot recorded9DC
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.33 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 7643 specifications →