Tube cross-reference
33GY7A alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 33GY7A rectifier - damper diode. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 33GY7A
The following tubes are recorded as possible replacements for 33GY7A. This direction does not establish that 33GY7A can replace them.
Rectifier - Damper Diode
The database records 33GY7 as a possible replacement for33GY7A.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | BeamPower-Diode | BeamPower-Diode |
| Base | 12FN | 12-pin Compactron |
| Socket | IO | B12C |
| Base pins | 12 | 12 |
| Sections | 2 | 2 |
| Heater voltage | 33.6 V | 33.6 V |
| Heater current | 0.45 A | 0.45 A |
Where 33GY7A can be used as the replacement
In these recorded relationships, 33GY7A is the replacement tube. The listed original tubes are not automatically suitable as replacements for 33GY7A.
Rectifier - Damper Diode
The database records 33GY7A as a possible replacement for33GY7.
No special restrictions are recorded for this substitution.
| Specification | 33GY7A replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | BeamPower-Diode | BeamPower-Diode |
| Base | 12FN | 12-pin Compactron |
| Socket | IO | B12C |
| Base pins | 12 | 12 |
| Sections | 2 | 2 |
| Heater voltage | 33.6 V | 33.6 V |
| Heater current | 0.45 A | 0.45 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 33GY7A specifications →