Tube cross-reference
6MQ8 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6MQ8 voltage triode pentode. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6MQ8
The following tubes are recorded as possible replacements for 6MQ8. This direction does not establish that 6MQ8 can replace them.
Voltage Radio Detector Converter
The database records 6EA8 as a possible replacement for6MQ8.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Triode Pentode | Voltage Radio Detector Converter |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | Not recorded | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.535 A | 0.45 A |
Voltage Radio Detector Converter
The database records 6U8 as a possible replacement for6MQ8.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Triode Pentode | Voltage Radio Detector Converter |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | Not recorded | 9AE |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.535 A | 0.45 A |
Voltage Radio Detector Converter
The database records 6U8A as a possible replacement for6MQ8.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Triode Pentode | Voltage Radio Detector Converter |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | Not recorded | EIA 9AE |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.535 A | 0.45 A |
Where 6MQ8 can be used as the replacement
In these recorded relationships, 6MQ8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6MQ8.
Voltage Radio Detector Converter
The database records 6MQ8 as a possible replacement for6EA8.
- Parallel heater circuits only
- Not suitable for all circuits
| Specification | 6MQ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Triode Pentode | Voltage Radio Detector Converter |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | Not recorded | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.535 A | 0.45 A |
Voltage Radio Detector Converter
The database records 6MQ8 as a possible replacement for6U8.
- Parallel heater circuits only
| Specification | 6MQ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Triode Pentode | Voltage Radio Detector Converter |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | Not recorded | 9AE |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.535 A | 0.45 A |
Voltage Radio Detector Converter
The database records 6MQ8 as a possible replacement for6U8A.
- Not suitable for all circuits
| Specification | 6MQ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Triode Pentode | Voltage Radio Detector Converter |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | Not recorded | EIA 9AE |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.535 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 6MQ8 specifications →