Tube cross-reference
6BA8A alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6BA8A voltage pentode - sharp cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6BA8A
The following tubes are recorded as possible replacements for 6BA8A. This direction does not establish that 6BA8A can replace them.
Voltage Triode Pentode
The database records 6AU8 as a possible replacement for6BA8A.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Triode Pentode |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | 9DX |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.45 A |
Voltage Triode Pentode
The database records 6AU8A as a possible replacement for6BA8A.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Triode Pentode |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | 9DX |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.6 A |
Voltage Triode Pentode
The database records 6AW8 as a possible replacement for6BA8A.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Triode Pentode |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | 9DX |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.6 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 6AW8A as a possible replacement for6BA8A.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | 9DX |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.6 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 6BA8 as a possible replacement for6BA8A.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.6 A |
Voltage Radio Detector Converter
The database records 6BH8 as a possible replacement for6BA8A.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Radio Detector Converter |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | 9DX |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.6 A |
Where 6BA8A can be used as the replacement
In these recorded relationships, 6BA8A is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6BA8A.
Voltage Triode Pentode
The database records 6BA8A as a possible replacement for6AU8.
No special restrictions are recorded for this substitution.
| Specification | 6BA8A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Triode Pentode |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | 9DX |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.45 A |
Voltage Triode Pentode
The database records 6BA8A as a possible replacement for6AU8A.
No special restrictions are recorded for this substitution.
| Specification | 6BA8A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Triode Pentode |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | 9DX |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.6 A |
Voltage Triode Pentode
The database records 6BA8A as a possible replacement for6AW8.
No special restrictions are recorded for this substitution.
| Specification | 6BA8A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Triode Pentode |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | 9DX |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.6 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 6BA8A as a possible replacement for6AW8A.
No special restrictions are recorded for this substitution.
| Specification | 6BA8A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | 9DX |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.6 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 6BA8A as a possible replacement for6BA8.
No special restrictions are recorded for this substitution.
| Specification | 6BA8A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.6 A |
Voltage Radio Detector Converter
The database records 6BA8A as a possible replacement for6BH8.
No special restrictions are recorded for this substitution.
| Specification | 6BA8A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Radio Detector Converter |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9DX | 9DX |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.6 A | 0.6 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 6BA8A specifications →