Tube cross-reference
12BY7A alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 12BY7A voltage pentode - sharp cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 12BY7A
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.
12BV7 Voltage Pentode - Sharp Cutoff (single)
- Base
- 9BF
- Socket
- B9A
- Base pins
- 9
- Sections
- 1
- Heater voltage
- 12.6 V
- Heater current
- 0.3 A
Replacement tubes for 12BY7A
The following tubes are recorded as possible replacements for 12BY7A. This direction does not establish that 12BY7A can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records 12BV7 as a possible replacement for12BY7A.
- Parallel heater circuits only
- No-warmup series circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9BF | 9BF |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 12BY7 as a possible replacement for12BY7A.
- Parallel heater circuits only
- No-warmup series circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9BF | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 12DQ7 as a possible replacement for12BY7A.
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 | Pentode |
| Base | 9BF | 9BF |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.3 A | 0.3 A |
Where 12BY7A can be used as the replacement
In these recorded relationships, 12BY7A is the replacement tube. The listed original tubes are not automatically suitable as replacements for 12BY7A.
Voltage Pentode - Sharp Cutoff (single)
The database records 12BY7A as a possible replacement for12BV7.
No special restrictions are recorded for this substitution.
| Specification | 12BY7A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9BF | 9BF |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 12BY7A as a possible replacement for12BY7.
No special restrictions are recorded for this substitution.
| Specification | 12BY7A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9BF | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 12BY7A as a possible replacement for12DQ7.
No special restrictions are recorded for this substitution.
| Specification | 12BY7A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9BF | 9BF |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 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 12BY7A specifications →