Tube cross-reference
12GN7A alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 12GN7A voltage pentode - sharp cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 12GN7A
The following tubes are recorded as possible replacements for 12GN7A. This direction does not establish that 12GN7A can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records 12HG7 as a possible replacement for12GN7A.
- 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 | 0.26 A |
Where 12GN7A can be used as the replacement
In these recorded relationships, 12GN7A is the replacement tube. The listed original tubes are not automatically suitable as replacements for 12GN7A.
Voltage Pentode - Sharp Cutoff (single)
The database records 12GN7A as a possible replacement for12HG7.
- No-warmup series circuits only
| Specification | 12GN7A 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 | 0.26 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 12GN7A specifications →