Tube cross-reference
1C3 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 1C3 voltage - triode (single). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 1C3
The following tubes are recorded as possible replacements for 1C3. This direction does not establish that 1C3 can replace them.
Voltage Pentode or Tetrode (under 100V)
The database records 1AB6 as a possible replacement for1C3.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single) | Voltage Pentode or Tetrode (under 100V) |
| Construction | Triode | Heptode |
| Base | 5CF | 7DH |
| Socket | Not recorded | B7G |
| Base pins | Not recorded | 7 |
| Sections | 1 | 1 |
| Heater voltage | 1.4 V | 1.4 V |
| Heater current | 0.05 A | 0.025 A |
Where 1C3 can be used as the replacement
In these recorded relationships, 1C3 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 1C3.
Voltage Pentode or Tetrode (under 100V)
The database records 1C3 as a possible replacement for1AB6.
No special restrictions are recorded for this substitution.
| Specification | 1C3 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single) | Voltage Pentode or Tetrode (under 100V) |
| Construction | Triode | Heptode |
| Base | 5CF | 7DH |
| Socket | Not recorded | B7G |
| Base pins | Not recorded | 7 |
| Sections | 1 | 1 |
| Heater voltage | 1.4 V | 1.4 V |
| Heater current | 0.05 A | 0.025 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 1C3 specifications →