Tube cross-reference
EY81F alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the EY81F rectifier - damper diode. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for EY81F
The following tubes are recorded as possible replacements for EY81F. This direction does not establish that EY81F can replace them.
Rectifier - Damper Diode
The database records 6V3 as a possible replacement forEY81F.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | 9BD |
| Socket | B9A | Not recorded |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.9 A | 1.75 A |
Where EY81F can be used as the replacement
In these recorded relationships, EY81F is the replacement tube. The listed original tubes are not automatically suitable as replacements for EY81F.
Rectifier - Damper Diode
The database records EY81F as a possible replacement for6V3.
No special restrictions are recorded for this substitution.
| Specification | EY81F replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | 9BD |
| Socket | B9A | Not recorded |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.9 A | 1.75 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 EY81F specifications →