Tube cross-reference
7733 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 7733 voltage pentode. Compare core specifications and verify every restriction before using a replacement.
Where 7733 can be used as the replacement
In these recorded relationships, 7733 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 7733.
Voltage Pentode - Sharp Cutoff (single)
The database records 7733 as a possible replacement for12BY7.
No special restrictions are recorded for this substitution.
| Specification | 7733 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | E9-1 / 9BF | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 12.6 V |
| Heater current | 0.6 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 7733 specifications →