Tube cross-reference
6C9 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6C9 voltage radio detector converter. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6C9
The following tubes are recorded as possible replacements for 6C9. This direction does not establish that 6C9 can replace them.
Voltage - Triode (with diode, heptode or hexode)
The database records 6CU7 as a possible replacement for6C9.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage - Triode (with diode, heptode or hexode) |
| Construction | Tetrode-Tetrode | Hexode-Triode |
| Base | 10F | OCTAL |
| Socket | B10G | B9A |
| Base pins | 10 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.23 A |
Where 6C9 can be used as the replacement
In these recorded relationships, 6C9 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6C9.
Voltage - Triode (with diode, heptode or hexode)
The database records 6C9 as a possible replacement for6CU7.
- Parallel heater circuits only
| Specification | 6C9 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Radio Detector Converter | Voltage - Triode (with diode, heptode or hexode) |
| Construction | Tetrode-Tetrode | Hexode-Triode |
| Base | 10F | OCTAL |
| Socket | B10G | B9A |
| Base pins | 10 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.4 A | 0.23 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 6C9 specifications →