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Tube Tinker — Electron Tube Database

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6HC8 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the 6HC8 voltage triode pentode. Compare core specifications and verify every restriction before using a replacement.

Replacement tubes for 6HC8

The following tubes are recorded as possible replacements for 6HC8. This direction does not establish that 6HC8 can replace them.

ECL82

Power - Pentode (NOT beam)

Foreign To American

The database records ECL82 as a possible replacement for6HC8.

  • Parallel heater circuits only
SpecificationOriginal tubeReplacement
Tube typeVoltage Triode PentodePower - Pentode (NOT beam)
ConstructionPentode-TriodePentode-Triode
BaseNot recorded9C12
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.45 A0.78 A
6BM8

Power - TV Vertical Output

Receiving Tubes

The database records 6BM8 as a possible replacement for6HC8.

  • Parallel heater circuits only
SpecificationOriginal tubeReplacement
Tube typeVoltage Triode PentodePower - TV Vertical Output
ConstructionPentode-TriodePentode-Triode
BaseNot recorded9EX
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.45 A0.78 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 6HC8 specifications →