Tube cross-reference
DF33 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the DF33 voltage pentode - remote cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for DF33
The following tubes are recorded as possible replacements for DF33. This direction does not establish that DF33 can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records 1N5GT as a possible replacement forDF33.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 5Y |
| Socket | IO | IO |
| Base pins | 8 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 1.4 V | 1.4 V |
| Heater current | 0.05 A | 0.05 A |
Where DF33 can be used as the replacement
In these recorded relationships, DF33 is the replacement tube. The listed original tubes are not automatically suitable as replacements for DF33.
Voltage Pentode - Sharp Cutoff (single)
The database records DF33 as a possible replacement for1N5GT.
No special restrictions are recorded for this substitution.
| Specification | DF33 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 5Y |
| Socket | IO | IO |
| Base pins | 8 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 1.4 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 DF33 specifications →