Tube cross-reference
12BY7 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 12BY7 voltage pentode - sharp cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 12BY7
The following tubes are recorded as possible replacements for 12BY7. This direction does not establish that 12BY7 can replace them.
Voltage Pentode
The database records 7733 as a possible replacement for12BY7.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode |
| Construction | Pentode | Pentode |
| Base | Not recorded | E9-1 / 9BF |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 6.3 V |
| Heater current | 0.3 A | 0.6 A |
Power - Pentode Single (NOT beam) (under 10W)
The database records 8448 as a possible replacement for12BY7.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Power - Pentode Single (NOT beam) (under 10W) |
| Construction | Pentode | Pentode |
| Base | Not recorded | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 13.5 V |
| Heater current | 0.3 A | 0.26 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 12BV7 as a possible replacement for12BY7.
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 | Not recorded | 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 | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 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 12DQ7 as a possible replacement for12BY7.
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 | Not recorded | 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 12BY7 can be used as the replacement
In these recorded relationships, 12BY7 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 12BY7.
Voltage Pentode - Sharp Cutoff (single)
The database records 12BY7 as a possible replacement for12BV7.
No special restrictions are recorded for this substitution.
| Specification | 12BY7 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 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 | 12BY7 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 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 12BY7 specifications →