Tube cross-reference
18042 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 18042 voltage pentode. Compare core specifications and verify every restriction before using a replacement.
Where 18042 can be used as the replacement
In these recorded relationships, 18042 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 18042.
Voltage Pentode
The database records 18042 as a possible replacement for6086.
No special restrictions are recorded for this substitution.
| Specification | 18042 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode |
| Construction | Pentode | Pentode |
| Base | Not recorded | 9BK |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 18 V | 18 V |
| Heater current | 0.1 A | 0.1 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 18042 specifications →