Tube cross-reference
6C6 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6C6 voltage pentode. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6C6
The following tubes are recorded as possible replacements for 6C6. This direction does not establish that 6C6 can replace them.
Voltage Radio Detector Converter
The database records 77 as a possible replacement for6C6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Radio Detector Converter |
| Construction | Pentode | Pentode |
| Base | 6F | 8F |
| Socket | UX6 | UX6 |
| Base pins | 6 | 6 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Where 6C6 can be used as the replacement
In these recorded relationships, 6C6 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6C6.
Voltage Pentode - Sharp Cutoff (single)
The database records 6C6 as a possible replacement for1603.
No special restrictions are recorded for this substitution.
| Specification | 6C6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | 6F | Not recorded |
| Socket | UX6 | UX6 |
| Base pins | 6 | 6 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Voltage Radio Detector Converter
The database records 6C6 as a possible replacement for77.
No special restrictions are recorded for this substitution.
| Specification | 6C6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Radio Detector Converter |
| Construction | Pentode | Pentode |
| Base | 6F | 8F |
| Socket | UX6 | UX6 |
| Base pins | 6 | 6 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 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 6C6 specifications →