Tube cross-reference
1U4WA alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 1U4WA voltage pentode or tetrode (under 100v). Compare core specifications and verify every restriction before using a replacement.
Where 1U4WA can be used as the replacement
In these recorded relationships, 1U4WA is the replacement tube. The listed original tubes are not automatically suitable as replacements for 1U4WA.
Voltage Pentode or Tetrode (under 100V)
The database records 1U4WA as a possible replacement for5910.
No special restrictions are recorded for this substitution.
| Specification | 1U4WA replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode or Tetrode (under 100V) | Voltage Pentode or Tetrode (under 100V) |
| Construction | Pentode | Pentode |
| Base | 6AR | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 1.25 V | 1.4 V |
| Heater current | 0.05 A | 0.05 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 1U4WA as a possible replacement for1U4.
No special restrictions are recorded for this substitution.
| Specification | 1U4WA replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode or Tetrode (under 100V) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 6AR | 6AR |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 1.25 V | 1.4 V |
| Heater current | 0.05 A | 0.05 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 1U4WA specifications →