Tube cross-reference
D3F alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the D3F voltage pentode. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for D3F
The following tubes are recorded as possible replacements for D3F. This direction does not establish that D3F can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records 959 as a possible replacement forD3F.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 5BE |
| Socket | ACORN5 | ACORN7 |
| Base pins | 5 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 1.25 V | 1.25 V |
| Heater current | 0.05 A | 0.05 A |
Where D3F can be used as the replacement
In these recorded relationships, D3F is the replacement tube. The listed original tubes are not automatically suitable as replacements for D3F.
Voltage Pentode - Sharp Cutoff (single)
The database records D3F as a possible replacement for959.
No special restrictions are recorded for this substitution.
| Specification | D3F replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 5BE |
| Socket | ACORN5 | ACORN7 |
| Base pins | 5 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 1.25 V | 1.25 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 D3F specifications →