Tube cross-reference
EF97 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the EF97 voltage pentode or tetrode (under 100v). Compare core specifications and verify every restriction before using a replacement.
Exact variations of EF97
These designations belong to the same electrical variation group. Their names may differ because of international standards, manufacturing tolerances, or materials, but they are recorded as electrically equivalent—not merely substitutes.
6ES6 Voltage Pentode - Remote Cutoff (single)
- Base
- Not recorded
- Socket
- B7G
- Base pins
- 7
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.3 A
Replacement tubes for EF97
The following tubes are recorded as possible replacements for EF97. This direction does not establish that EF97 can replace them.
Voltage Pentode - Remote Cutoff (single)
The database records 6ES6 as a possible replacement forEF97.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode or Tetrode (under 100V) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | MINIATURE | Not recorded |
| Socket | B9A | B7G |
| Base pins | 9 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 A | 0.3 A |
Where EF97 can be used as the replacement
In these recorded relationships, EF97 is the replacement tube. The listed original tubes are not automatically suitable as replacements for EF97.
Voltage Pentode - Remote Cutoff (single)
The database records EF97 as a possible replacement for6ES6.
No special restrictions are recorded for this substitution.
| Specification | EF97 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode or Tetrode (under 100V) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | MINIATURE | Not recorded |
| Socket | B9A | B7G |
| Base pins | 9 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 A | 0.3 A |
Voltage Pentode or Tetrode (under 100V)
The database records EF97 as a possible replacement for6ET6.
No special restrictions are recorded for this substitution.
| Specification | EF97 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode or Tetrode (under 100V) | Voltage Pentode or Tetrode (under 100V) |
| Construction | Pentode | Pentode |
| Base | MINIATURE | Not recorded |
| Socket | B9A | B7G |
| Base pins | 9 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 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 EF97 specifications →