Tube cross-reference
M8091 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the M8091 rectifier - half wave. Compare core specifications and verify every restriction before using a replacement.
Where M8091 can be used as the replacement
In these recorded relationships, M8091 is the replacement tube. The listed original tubes are not automatically suitable as replacements for M8091.
Rectifier - Half Wave
The database records M8091 as a possible replacement for6443.
No special restrictions are recorded for this substitution.
| Specification | M8091 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Half Wave | Rectifier - Half Wave |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | 9BW |
| Socket | Not recorded | B9A |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 1.15 A | 1.1 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 M8091 specifications →