Tube cross-reference
6CQ8 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6CQ8 voltage radio detector converter. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6CQ8
The following tubes are recorded as possible replacements for 6CQ8. This direction does not establish that 6CQ8 can replace them.
Voltage Radio Detector Converter
The database records 6EA8 as a possible replacement for6CQ8.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Radio Detector Converter |
| Construction | Tetrode-Triode | Pentode-Triode |
| Base | 9GE | Not recorded |
| 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 |
Voltage Radio Detector Converter
The database records 6U8A as a possible replacement for6CQ8.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Radio Detector Converter |
| Construction | Tetrode-Triode | Pentode-Triode |
| Base | 9GE | EIA 9AE |
| 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 6CQ8 can be used as the replacement
In these recorded relationships, 6CQ8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6CQ8.
Voltage Pentode - Sharp Cutoff (single)
The database records 6CQ8 as a possible replacement for6AX8.
- Not suitable for all circuits
| Specification | 6CQ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Tetrode-Triode | Pentode-Triode |
| Base | 9GE | 9AE |
| 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 |
Voltage Radio Detector Converter
The database records 6CQ8 as a possible replacement for6EA8.
- Not suitable for all circuits
| Specification | 6CQ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Radio Detector Converter |
| Construction | Tetrode-Triode | Pentode-Triode |
| Base | 9GE | Not recorded |
| 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 |
Voltage Triode Pentode
The database records 6CQ8 as a possible replacement for6GH8.
- Not suitable for all circuits
| Specification | 6CQ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Triode Pentode |
| Construction | Tetrode-Triode | Pentode-Triode |
| Base | 9GE | 9AE |
| 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 |
Voltage Triode Pentode
The database records 6CQ8 as a possible replacement for6GH8A.
- Not suitable for all circuits
| Specification | 6CQ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Triode Pentode |
| Construction | Tetrode-Triode | Pentode-Triode |
| Base | 9GE | 9AE |
| 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 |
Voltage Triode Pentode
The database records 6CQ8 as a possible replacement for6GJ8.
- Not suitable for all circuits
| Specification | 6CQ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Triode Pentode |
| Construction | Tetrode-Triode | Pentode-Triode |
| Base | 9GE | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.45 A | 0.6 A |
Voltage Triode Pentode
The database records 6CQ8 as a possible replacement for6LM8.
- Not suitable for all circuits
| Specification | 6CQ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Triode Pentode |
| Construction | Tetrode-Triode | Pentode-Triode |
| Base | 9GE | 9AE |
| 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 |
Voltage Radio Detector Converter
The database records 6CQ8 as a possible replacement for6U8.
- Not suitable for all circuits
| Specification | 6CQ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Radio Detector Converter |
| Construction | Tetrode-Triode | Pentode-Triode |
| Base | 9GE | 9AE |
| 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 |
Voltage Radio Detector Converter
The database records 6CQ8 as a possible replacement for6U8A.
- Not suitable for all circuits
| Specification | 6CQ8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Radio Detector Converter |
| Construction | Tetrode-Triode | Pentode-Triode |
| Base | 9GE | EIA 9AE |
| 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 6CQ8 specifications →