Tube cross-reference
5BS8 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 5BS8 voltage - dual triode (similar high frequency). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 5BS8
The following tubes are recorded as possible replacements for 5BS8. This direction does not establish that 5BS8 can replace them.
Voltage - Dual Triode (similar high frequency)
The database records 5BQ7A as a possible replacement for5BS8.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (similar high frequency) |
| Construction | Triode-Triode | Triode-Triode |
| Base | Not recorded | 9AJ |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 2 | 2 |
| Heater voltage | 5.6 V | 5.6 V |
| Heater current | 0.45 A | 0.45 A |
Where 5BS8 can be used as the replacement
In these recorded relationships, 5BS8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 5BS8.
Voltage - Dual Triode (similar high frequency)
The database records 5BS8 as a possible replacement for5BQ7A.
No special restrictions are recorded for this substitution.
| Specification | 5BS8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (similar high frequency) |
| Construction | Triode-Triode | Triode-Triode |
| Base | Not recorded | 9AJ |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 2 | 2 |
| Heater voltage | 5.6 V | 5.6 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 5BS8 specifications →