Tube cross-reference
EF93 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the EF93 voltage pentode - remote cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for EF93
The following tubes are recorded as possible replacements for EF93. This direction does not establish that EF93 can replace them.
Voltage Pentode - Remote Cutoff (single)
The database records 6BA6 as a possible replacement forEF93.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | B7G | 7CC |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Where EF93 can be used as the replacement
In these recorded relationships, EF93 is the replacement tube. The listed original tubes are not automatically suitable as replacements for EF93.
Voltage Pentode - Remote Cutoff (single)
The database records EF93 as a possible replacement for5749.
No special restrictions are recorded for this substitution.
| Specification | EF93 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | B7G | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Pentode - Remote Cutoff (single)
The database records EF93 as a possible replacement for6660.
No special restrictions are recorded for this substitution.
| Specification | EF93 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | B7G | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Pentode - Remote Cutoff (single)
The database records EF93 as a possible replacement for6BA6.
No special restrictions are recorded for this substitution.
| Specification | EF93 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | B7G | 7CC |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 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 EF93 specifications →