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Tube Tinker — Electron Tube Database

Tube cross-reference

6KS8 alternatives, equivalents, and replacements

Review exact electrical variations and directional substitutions recorded for the 6KS8 voltage triode pentode. Compare core specifications and verify every restriction before using a replacement.

Replacement tubes for 6KS8

The following tubes are recorded as possible replacements for 6KS8. This direction does not establish that 6KS8 can replace them.

6AU8

Voltage Triode Pentode

Receiving Tubes

The database records 6AU8 as a possible replacement for6KS8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Triode PentodeVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
BaseB9A9DX
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A0.45 A
6AU8A

Voltage Triode Pentode

Receiving Tubes

The database records 6AU8A as a possible replacement for6KS8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Triode PentodeVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
BaseB9A9DX
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A0.6 A
6AW8

Voltage Triode Pentode

Receiving Tubes

The database records 6AW8 as a possible replacement for6KS8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Triode PentodeVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
BaseB9A9DX
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A0.6 A
6AW8A

Voltage Pentode - Sharp Cutoff (single)

Receiving Tubes

The database records 6AW8A as a possible replacement for6KS8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Triode PentodeVoltage Pentode - Sharp Cutoff (single)
ConstructionPentode-TriodePentode-Triode
BaseB9A9DX
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A0.6 A
6CX8

Power - Pentode (NOT beam)

Receiving Tubes

The database records 6CX8 as a possible replacement for6KS8.

  • Parallel heater circuits only
SpecificationOriginal tubeReplacement
Tube typeVoltage Triode PentodePower - Pentode (NOT beam)
ConstructionPentode-TriodePentode-Triode
BaseB9A9DX
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A0.75 A
6EB8

Power - Pentode (NOT beam)

Receiving Tubes

The database records 6EB8 as a possible replacement for6KS8.

  • Parallel heater circuits only
SpecificationOriginal tubeReplacement
Tube typeVoltage Triode PentodePower - Pentode (NOT beam)
ConstructionPentode-TriodePentode-Triode
BaseB9A9DX
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A0.75 A
6GN8

Voltage Triode Pentode

Receiving Tubes

The database records 6GN8 as a possible replacement for6KS8.

  • Parallel heater circuits only
SpecificationOriginal tubeReplacement
Tube typeVoltage Triode PentodeVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
BaseB9A9DX
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A0.75 A
6HF8

Voltage Triode Pentode

Receiving Tubes

The database records 6HF8 as a possible replacement for6KS8.

  • Parallel heater circuits only
SpecificationOriginal tubeReplacement
Tube typeVoltage Triode PentodeVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
BaseB9A9DX
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A0.75 A
6HZ8

Power - Pentode (NOT beam)

Receiving Tubes

The database records 6HZ8 as a possible replacement for6KS8.

  • Parallel heater circuits only
SpecificationOriginal tubeReplacement
Tube typeVoltage Triode PentodePower - Pentode (NOT beam)
ConstructionPentode-TriodePentode-Triode
BaseB9ANot recorded
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A1.125 A
6JA8

Voltage Triode Tetrode

Receiving Tubes

The database records 6JA8 as a possible replacement for6KS8.

  • Parallel heater circuits only
SpecificationOriginal tubeReplacement
Tube typeVoltage Triode PentodeVoltage Triode Tetrode
ConstructionPentode-TriodeTetrode-Triode
BaseB9A9DX
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A0.75 A
6JE8

Power - Pentode (NOT beam)

Receiving Tubes

The database records 6JE8 as a possible replacement for6KS8.

  • Parallel heater circuits only
SpecificationOriginal tubeReplacement
Tube typeVoltage Triode PentodePower - Pentode (NOT beam)
ConstructionPentode-TriodePentode-Triode
BaseB9ANot recorded
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A0.78 A
6JV8

Voltage Triode Pentode

Receiving Tubes

The database records 6JV8 as a possible replacement for6KS8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Triode PentodeVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
BaseB9A9AE
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A0.6 A
6LF8

Voltage Triode Pentode

Receiving Tubes

The database records 6LF8 as a possible replacement for6KS8.

No special restrictions are recorded for this substitution.

SpecificationOriginal tubeReplacement
Tube typeVoltage Triode PentodeVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
BaseB9A9DX
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A0.6 A

Where 6KS8 can be used as the replacement

In these recorded relationships, 6KS8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6KS8.

6AW8

Voltage Triode Pentode

Receiving Tubes

The database records 6KS8 as a possible replacement for6AW8.

No special restrictions are recorded for this substitution.

Specification6KS8 replacementOriginal tube
Tube typeVoltage Triode PentodeVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
BaseB9A9DX
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A0.6 A
6AW8A

Voltage Pentode - Sharp Cutoff (single)

Receiving Tubes

The database records 6KS8 as a possible replacement for6AW8A.

No special restrictions are recorded for this substitution.

Specification6KS8 replacementOriginal tube
Tube typeVoltage Triode PentodeVoltage Pentode - Sharp Cutoff (single)
ConstructionPentode-TriodePentode-Triode
BaseB9A9DX
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A0.6 A
6JV8

Voltage Triode Pentode

Receiving Tubes

The database records 6KS8 as a possible replacement for6JV8.

No special restrictions are recorded for this substitution.

Specification6KS8 replacementOriginal tube
Tube typeVoltage Triode PentodeVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
BaseB9A9AE
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A0.6 A
6LF8

Voltage Triode Pentode

Receiving Tubes

The database records 6KS8 as a possible replacement for6LF8.

No special restrictions are recorded for this substitution.

Specification6KS8 replacementOriginal tube
Tube typeVoltage Triode PentodeVoltage Triode Pentode
ConstructionPentode-TriodePentode-Triode
BaseB9A9DX
SocketB9AB9A
Base pins99
Sections22
Heater voltage6.3 V6.3 V
Heater current0.6 A0.6 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 6KS8 specifications →