Tube cross-reference
6BQ7A alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6BQ7A voltage - dual triode (similar high frequency). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6BQ7A
The following tubes are recorded as possible replacements for 6BQ7A. This direction does not establish that 6BQ7A can replace them.
Voltage - Dual Triode (similar high frequency)
The database records 6BC8 as a possible replacement for6BQ7A.
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 | 9AJ | 9AJ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.6 A |
Voltage - Dual Triode (similar high frequency)
The database records 6BK7 as a possible replacement for6BQ7A.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (similar high frequency) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9AJ | 9AJ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.45 A |
Voltage - Dual Triode (similar high frequency)
The database records 6BK7A as a possible replacement for6BQ7A.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (similar high frequency) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9AJ | 9AJ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.45 A |
Voltage - Dual Triode (dissimilar)
The database records 6BK7B as a possible replacement for6BQ7A.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (dissimilar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9AJ | 9AJ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.45 A |
Voltage - Dual Triode (similar high frequency)
The database records 6BQ7 as a possible replacement for6BQ7A.
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 | 9AJ | 9AJ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.4 A |
Voltage - Dual Triode (similar high frequency)
The database records 6BS8 as a possible replacement for6BQ7A.
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 | 9AJ | 9AJ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.4 A |
Voltage - Dual Triode (similar high frequency)
The database records 6BX8 as a possible replacement for6BQ7A.
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 | 9AJ | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.4 A |
Voltage - Dual Triode (similar high frequency)
The database records 6BZ7 as a possible replacement for6BQ7A.
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 | 9AJ | 9AJ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.4 A |
Voltage - Dual Triode (similar high frequency)
The database records 6BZ8 as a possible replacement for6BQ7A.
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 | 9AJ | 9AJ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.4 A |
Where 6BQ7A can be used as the replacement
In these recorded relationships, 6BQ7A is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6BQ7A.
Voltage - Dual Triode (similar high frequency)
The database records 6BQ7A as a possible replacement for6BC8.
No special restrictions are recorded for this substitution.
| Specification | 6BQ7A replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (similar high frequency) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9AJ | 9AJ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.6 A |
Voltage - Dual Triode (similar high frequency)
The database records 6BQ7A as a possible replacement for6BK7.
- Parallel heater circuits only
| Specification | 6BQ7A replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (similar high frequency) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9AJ | 9AJ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.45 A |
Voltage - Dual Triode (similar high frequency)
The database records 6BQ7A as a possible replacement for6BK7A.
- Parallel heater circuits only
| Specification | 6BQ7A replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (similar high frequency) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9AJ | 9AJ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.45 A |
Voltage - Dual Triode (dissimilar)
The database records 6BQ7A as a possible replacement for6BK7B.
- Parallel heater circuits only
| Specification | 6BQ7A replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (dissimilar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9AJ | 9AJ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.45 A |
Voltage - Dual Triode (similar high frequency)
The database records 6BQ7A as a possible replacement for6BQ7.
No special restrictions are recorded for this substitution.
| Specification | 6BQ7A replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (similar high frequency) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9AJ | 9AJ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.4 A |
Voltage - Dual Triode (similar high frequency)
The database records 6BQ7A as a possible replacement for6BS8.
No special restrictions are recorded for this substitution.
| Specification | 6BQ7A replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (similar high frequency) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9AJ | 9AJ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.4 A |
Voltage - Dual Triode (similar high frequency)
The database records 6BQ7A as a possible replacement for6BX8.
No special restrictions are recorded for this substitution.
| Specification | 6BQ7A replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (similar high frequency) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9AJ | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.4 A |
Voltage - Dual Triode (similar high frequency)
The database records 6BQ7A as a possible replacement for6BZ7.
No special restrictions are recorded for this substitution.
| Specification | 6BQ7A replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (similar high frequency) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9AJ | 9AJ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.4 A |
Voltage - Dual Triode (similar high frequency)
The database records 6BQ7A as a possible replacement for6BZ8.
No special restrictions are recorded for this substitution.
| Specification | 6BQ7A replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (similar high frequency) | Voltage - Dual Triode (similar high frequency) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9AJ | 9AJ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.4 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 6BQ7A specifications →