Tube cross-reference
RK31 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the RK31 power - triode. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for RK31
The following tubes are recorded as possible replacements for RK31. This direction does not establish that RK31 can replace them.
830B
Communications And Special Purpose TubesPower - Triode
The database records 830B as a possible replacement forRK31.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Triode | Power - Triode |
| Construction | Triode | Triode |
| Base | Not recorded | Not recorded |
| Socket | UX4 | UX4 |
| Base pins | Not recorded | 4 |
| Sections | 1 | 1 |
| Heater voltage | 7.5 V | 10 V |
| Heater current | 3 A | 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 RK31 specifications →