Tube cross-reference
3JD6 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 3JD6 voltage pentode - sharp cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 3JD6
The following tubes are recorded as possible replacements for 3JD6. This direction does not establish that 3JD6 can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records 3HM6 as a possible replacement for3JD6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 3.5 V | 3.15 V |
| Heater current | 0.6 A | 0.6 A |
Voltage Pentode - Remote Cutoff (single)
The database records 3HT6 as a possible replacement for3JD6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 3.5 V | 3.15 V |
| Heater current | 0.6 A | 0.6 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 3JC6 as a possible replacement for3JD6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 3.5 V | 3.5 V |
| Heater current | 0.6 A | 0.6 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 3JC6A as a possible replacement for3JD6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | 9PM |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 3.5 V | 3.5 V |
| Heater current | 0.6 A | 0.6 A |
Where 3JD6 can be used as the replacement
In these recorded relationships, 3JD6 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 3JD6.
Voltage Pentode - Remote Cutoff (single)
The database records 3JD6 as a possible replacement for3EH7.
- Not suitable for all circuits
| Specification | 3JD6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | 9AQ |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 3.5 V | 3.15 V |
| Heater current | 0.6 A | 0.6 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 3JD6 as a possible replacement for3EJ7.
- Not suitable for all circuits
| Specification | 3JD6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | E9-1 |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 3.5 V | 3.15 V |
| Heater current | 0.6 A | 0.6 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 3JD6 as a possible replacement for3HM6.
No special restrictions are recorded for this substitution.
| Specification | 3JD6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 3.5 V | 3.15 V |
| Heater current | 0.6 A | 0.6 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 3JD6 as a possible replacement for3JC6.
No special restrictions are recorded for this substitution.
| Specification | 3JD6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 3.5 V | 3.5 V |
| Heater current | 0.6 A | 0.6 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 3JD6 as a possible replacement for3JC6A.
No special restrictions are recorded for this substitution.
| Specification | 3JD6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 9PM | 9PM |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 3.5 V | 3.5 V |
| Heater current | 0.6 A | 0.6 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 3JD6 specifications →