Tube cross-reference
DAF91 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the DAF91 voltage pentode or tetrode (under 100v). Compare core specifications and verify every restriction before using a replacement.
Exact variations of DAF91
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.
1S5 Voltage Pentode or Tetrode (under 100V)
- Base
- 6AU
- Socket
- B7G
- Base pins
- 7
- Sections
- 2
- Heater voltage
- 1.4 V
- Heater current
- 0.05 A
Replacement tubes for DAF91
The following tubes are recorded as possible replacements for DAF91. This direction does not establish that DAF91 can replace them.
Voltage Pentode or Tetrode (under 100V)
The database records 1S5 as a possible replacement forDAF91.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode or Tetrode (under 100V) | Voltage Pentode or Tetrode (under 100V) |
| Construction | Diode-Pentode | Diode-Pentode |
| Base | B7G | 6AU |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 2 | 2 |
| Heater voltage | 1.4 V | 1.4 V |
| Heater current | 0.05 A | 0.05 A |
Where DAF91 can be used as the replacement
In these recorded relationships, DAF91 is the replacement tube. The listed original tubes are not automatically suitable as replacements for DAF91.
Voltage Pentode or Tetrode (under 100V)
The database records DAF91 as a possible replacement for1S5.
No special restrictions are recorded for this substitution.
| Specification | DAF91 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode or Tetrode (under 100V) | Voltage Pentode or Tetrode (under 100V) |
| Construction | Diode-Pentode | Diode-Pentode |
| Base | B7G | 6AU |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 2 | 2 |
| 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 DAF91 specifications →