Tube cross-reference
9U8A alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 9U8A voltage radio detector converter. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 9U8A
The following tubes are recorded as possible replacements for 9U8A. This direction does not establish that 9U8A can replace them.
Voltage Radio Detector Converter
The database records 9A8 as a possible replacement for9U8A.
- No-warmup series circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Radio Detector Converter |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9AE | 7AE |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 9.45 V | 9 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Radio Detector Converter
The database records 9U8 as a possible replacement for9U8A.
- No-warmup series circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Radio Detector Converter |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9AE | 9AE |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 9.45 V | 9 V |
| Heater current | 0.3 A | 0.3 A |
Where 9U8A can be used as the replacement
In these recorded relationships, 9U8A is the replacement tube. The listed original tubes are not automatically suitable as replacements for 9U8A.
Voltage Radio Detector Converter
The database records 9U8A as a possible replacement for9A8.
No special restrictions are recorded for this substitution.
| Specification | 9U8A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Radio Detector Converter |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9AE | 7AE |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 9.45 V | 9 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Radio Detector Converter
The database records 9U8A as a possible replacement for9U8.
No special restrictions are recorded for this substitution.
| Specification | 9U8A replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage Radio Detector Converter |
| Construction | Pentode-Triode | Pentode-Triode |
| Base | 9AE | 9AE |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 9.45 V | 9 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 9U8A specifications →