Tube cross-reference
6BX6 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6BX6 voltage pentode. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6BX6
These designations belong to the same electrical variation group. Their names may differ because of international standards, manufacturing tolerances, or materials, but they are recorded as electrically equivalent—not merely substitutes.
EF80 Voltage Pentode - High Frequency (single)
- Base
- B9A
- Socket
- B9A
- Base pins
- 9
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.3 A
Replacement tubes for 6BX6
The following tubes are recorded as possible replacements for 6BX6. This direction does not establish that 6BX6 can replace them.
Voltage Pentode - High Frequency (single)
The database records EF80 as a possible replacement for6BX6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - High Frequency (single) |
| Construction | Pentode | Pentode |
| Base | 9AQ | B9A |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Pentode - High Frequency (single)
The database records Z719 as a possible replacement for6BX6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - High Frequency (single) |
| Construction | Pentode | Pentode |
| Base | 9AQ | Not recorded |
| Socket | B9A | Not recorded |
| Base pins | 9 | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Pentode
The database records 6BW7 as a possible replacement for6BX6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode |
| Construction | Pentode | Pentode |
| Base | 9AQ | 9AQ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Pentode - Remote Cutoff (single)
The database records 6BY7 as a possible replacement for6BX6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9AQ | 9AQ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Pentode - Remote Cutoff (single)
The database records 6EC7 as a possible replacement for6BX6.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9AQ | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.2 A |
Voltage Pentode - High Frequency (single)
The database records 6EL7 as a possible replacement for6BX6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - High Frequency (single) |
| Construction | Pentode | Pentode |
| Base | 9AQ | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Where 6BX6 can be used as the replacement
In these recorded relationships, 6BX6 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6BX6.
Voltage Pentode - High Frequency (single)
The database records 6BX6 as a possible replacement forEF80.
No special restrictions are recorded for this substitution.
| Specification | 6BX6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - High Frequency (single) |
| Construction | Pentode | Pentode |
| Base | 9AQ | B9A |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Pentode - High Frequency (single)
The database records 6BX6 as a possible replacement forZ719.
No special restrictions are recorded for this substitution.
| Specification | 6BX6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - High Frequency (single) |
| Construction | Pentode | Pentode |
| Base | 9AQ | Not recorded |
| Socket | B9A | Not recorded |
| Base pins | 9 | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Pentode
The database records 6BX6 as a possible replacement for6BW7.
No special restrictions are recorded for this substitution.
| Specification | 6BX6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode |
| Construction | Pentode | Pentode |
| Base | 9AQ | 9AQ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Pentode - Remote Cutoff (single)
The database records 6BX6 as a possible replacement for6BY7.
No special restrictions are recorded for this substitution.
| Specification | 6BX6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9AQ | 9AQ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Pentode - Remote Cutoff (single)
The database records 6BX6 as a possible replacement for6EC7.
- Parallel heater circuits only
| Specification | 6BX6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9AQ | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.2 A |
Voltage Pentode - High Frequency (single)
The database records 6BX6 as a possible replacement for6EL7.
No special restrictions are recorded for this substitution.
| Specification | 6BX6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - High Frequency (single) |
| Construction | Pentode | Pentode |
| Base | 9AQ | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 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 6BX6 specifications →