Tube cross-reference
3D6 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 3D6 power - beam single (not sweep) (under 10w). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 3D6
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.
1299 Power - Beam Single (NOT sweep) (under 10W)
- Base
- Not recorded
- Socket
- Not recorded
- Base pins
- 8
- Sections
- 1
- Heater voltage
- 2.8 V
- Heater current
- 0.11 A
Replacement tubes for 3D6
The following tubes are recorded as possible replacements for 3D6. This direction does not establish that 3D6 can replace them.
Power - Beam Single (NOT sweep) (under 10W)
The database records 1299 as a possible replacement for3D6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Beam Single (NOT sweep) (under 10W) | Power - Beam Single (NOT sweep) (under 10W) |
| Construction | BeamPower | BeamPower |
| Base | 6BA | Not recorded |
| Socket | B8G | Not recorded |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 2.8 V | 2.8 V |
| Heater current | 0.11 A | 0.11 A |
Power - Pentode (NOT beam)
The database records 3LE4 as a possible replacement for3D6.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Beam Single (NOT sweep) (under 10W) | Power - Pentode (NOT beam) |
| Construction | BeamPower | Pentode |
| Base | 6BA | 6BA |
| Socket | B8G | SUBMINIATURE6 |
| Base pins | 8 | 6 |
| Sections | 1 | 1 |
| Heater voltage | 2.8 V | 1.4 V |
| Heater current | 0.11 A | 0.1 A |
Power - Beam (NOT sweep)
The database records 3LF4 as a possible replacement for3D6.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Beam Single (NOT sweep) (under 10W) | Power - Beam (NOT sweep) |
| Construction | BeamPower | BeamPower |
| Base | 6BA | 6BB |
| Socket | B8G | B7G |
| Base pins | 8 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.8 V | 2.8 V |
| Heater current | 0.11 A | 0.05 A |
Where 3D6 can be used as the replacement
In these recorded relationships, 3D6 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 3D6.
Power - Beam Single (NOT sweep) (under 10W)
The database records 3D6 as a possible replacement for1299.
No special restrictions are recorded for this substitution.
| Specification | 3D6 replacement | Original tube |
|---|---|---|
| Tube type | Power - Beam Single (NOT sweep) (under 10W) | Power - Beam Single (NOT sweep) (under 10W) |
| Construction | BeamPower | BeamPower |
| Base | 6BA | Not recorded |
| Socket | B8G | Not recorded |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 2.8 V | 2.8 V |
| Heater current | 0.11 A | 0.11 A |
Power - Pentode (NOT beam)
The database records 3D6 as a possible replacement for3LE4.
- Parallel heater circuits only
| Specification | 3D6 replacement | Original tube |
|---|---|---|
| Tube type | Power - Beam Single (NOT sweep) (under 10W) | Power - Pentode (NOT beam) |
| Construction | BeamPower | Pentode |
| Base | 6BA | 6BA |
| Socket | B8G | SUBMINIATURE6 |
| Base pins | 8 | 6 |
| Sections | 1 | 1 |
| Heater voltage | 2.8 V | 1.4 V |
| Heater current | 0.11 A | 0.1 A |
Power - Beam (NOT sweep)
The database records 3D6 as a possible replacement for3LF4.
- Parallel heater circuits only
| Specification | 3D6 replacement | Original tube |
|---|---|---|
| Tube type | Power - Beam Single (NOT sweep) (under 10W) | Power - Beam (NOT sweep) |
| Construction | BeamPower | BeamPower |
| Base | 6BA | 6BB |
| Socket | B8G | B7G |
| Base pins | 8 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 2.8 V | 2.8 V |
| Heater current | 0.11 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 3D6 specifications →