Tube cross-reference
12A8G alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 12A8G voltage radio detector converter. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 12A8G
The following tubes are recorded as possible replacements for 12A8G. This direction does not establish that 12A8G can replace them.
Voltage Radio Detector Converter
The database records 12A8GT as a possible replacement for12A8G.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Radio Detector Converter |
| Construction | Heptode | Heptode |
| Base | 8-A | Not recorded |
| Socket | IO | IO |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.15 A | 0.15 A |
Where 12A8G can be used as the replacement
In these recorded relationships, 12A8G is the replacement tube. The listed original tubes are not automatically suitable as replacements for 12A8G.
Voltage Radio Detector Converter
The database records 12A8G as a possible replacement for12A8GT.
No special restrictions are recorded for this substitution.
| Specification | 12A8G replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Radio Detector Converter |
| Construction | Heptode | Heptode |
| Base | 8-A | Not recorded |
| Socket | IO | IO |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 12.6 V | 12.6 V |
| Heater current | 0.15 A | 0.15 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 12A8G specifications →