Tube cross-reference
6CS8 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6CS8 voltage pentode - sharp cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6CS8
The following tubes are recorded as possible replacements for 6CS8. This direction does not establish that 6CS8 can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records 6CM8 as a possible replacement for6CS8.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9FZ | 9FZ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.45 A | 0.45 A |
Where 6CS8 can be used as the replacement
In these recorded relationships, 6CS8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6CS8.
Voltage Pentode - Sharp Cutoff (single)
The database records 6CS8 as a possible replacement for6CM8.
- Not suitable for all circuits
| Specification | 6CS8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9FZ | 9FZ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.45 A | 0.45 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 6CS8 specifications →