Tube cross-reference
12DW7 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 12DW7 voltage - dual triode (dissimilar). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 12DW7
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.
7247 Voltage - Dual Triode (dissimilar)
- Base
- 9A
- Socket
- B9A
- Base pins
- 9
- Sections
- 2
- Heater voltage
- 6.3 V
- Heater current
- 0.3 A
Replacement tubes for 12DW7
The following tubes are recorded as possible replacements for 12DW7. This direction does not establish that 12DW7 can replace them.
Voltage - Dual Triode (dissimilar)
The database records 7247 as a possible replacement for12DW7.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Dual Triode (dissimilar) | Voltage - Dual Triode (dissimilar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | Not recorded | 9A |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 12.6 V | 6.3 V |
| Heater current | 0.15 A | 0.3 A |
Where 12DW7 can be used as the replacement
In these recorded relationships, 12DW7 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 12DW7.
Voltage - Dual Triode (dissimilar)
The database records 12DW7 as a possible replacement for7247.
No special restrictions are recorded for this substitution.
| Specification | 12DW7 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Dual Triode (dissimilar) | Voltage - Dual Triode (dissimilar) |
| Construction | Triode-Triode | Triode-Triode |
| Base | Not recorded | 9A |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 12.6 V | 6.3 V |
| Heater current | 0.15 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 12DW7 specifications →