Tube cross-reference
W77 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the W77 voltage pentode - remote cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for W77
The following tubes are recorded as possible replacements for W77. This direction does not establish that W77 can replace them.
Voltage Pentode - Remote Cutoff (single)
The database records 6CQ6 as a possible replacement forW77.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 7DB |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 A | 0.2 A |
Where W77 can be used as the replacement
In these recorded relationships, W77 is the replacement tube. The listed original tubes are not automatically suitable as replacements for W77.
Voltage Pentode - Remote Cutoff (single)
The database records W77 as a possible replacement for6065.
No special restrictions are recorded for this substitution.
| Specification | W77 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 7DB |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 A | 0.3 A |
Voltage Pentode - Remote Cutoff (single)
The database records W77 as a possible replacement for6CQ6.
No special restrictions are recorded for this substitution.
| Specification | W77 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - Remote Cutoff (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 7DB |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 A | 0.2 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 W77 specifications →