Tube cross-reference
4CF6 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 4CF6 voltage pentode - sharp cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 4CF6
The following tubes are recorded as possible replacements for 4CF6. This direction does not establish that 4CF6 can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records 4AU6 as a possible replacement for4CF6.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 7BK |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 4.2 V | 4.2 V |
| Heater current | 0.45 A | 0.45 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 4BC5 as a possible replacement for4CF6.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 4.2 V | 4.2 V |
| Heater current | 0.45 A | 0.45 A |
Voltage Pentode - Remote Cutoff (single)
The database records 4BZ6 as a possible replacement for4CF6.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 7CM |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 4.2 V | 4.2 V |
| Heater current | 0.45 A | 0.45 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 4CB6 as a possible replacement for4CF6.
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 | Not recorded | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 4.2 V | 4.2 V |
| Heater current | 0.45 A | 0.45 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 4DK6 as a possible replacement for4CF6.
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 | Not recorded | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 4.2 V | 4.2 V |
| Heater current | 0.45 A | 0.45 A |
Where 4CF6 can be used as the replacement
In these recorded relationships, 4CF6 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 4CF6.
Voltage Pentode - Sharp Cutoff (single)
The database records 4CF6 as a possible replacement for4AU6.
- Not suitable for all circuits
| Specification | 4CF6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 7BK |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 4.2 V | 4.2 V |
| Heater current | 0.45 A | 0.45 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 4CF6 as a possible replacement for4BC5.
- Not suitable for all circuits
| Specification | 4CF6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 4.2 V | 4.2 V |
| Heater current | 0.45 A | 0.45 A |
Voltage Pentode - Remote Cutoff (single)
The database records 4CF6 as a possible replacement for4BZ6.
- Not suitable for all circuits
| Specification | 4CF6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 7CM |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 4.2 V | 4.2 V |
| Heater current | 0.45 A | 0.45 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 4CF6 as a possible replacement for4CB6.
No special restrictions are recorded for this substitution.
| Specification | 4CF6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 4.2 V | 4.2 V |
| Heater current | 0.45 A | 0.45 A |
Voltage Pentode - Sharp Cutoff (single)
The database records 4CF6 as a possible replacement for4DK6.
No special restrictions are recorded for this substitution.
| Specification | 4CF6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | Not recorded |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 4.2 V | 4.2 V |
| Heater current | 0.45 A | 0.45 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 4CF6 specifications →