Tube cross-reference
37 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 37 voltage - triode (single). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 37
These designations belong to the same electrical variation group. Their names may differ because of international standards, manufacturing tolerances, or materials, but they are recorded as electrically equivalent—not merely substitutes.
VT37 NEW (being researched)
- Base
- Not recorded
- Socket
- Not recorded
- Base pins
- Not recorded
- Sections
- 1
- Heater voltage
- Not recorded
- Heater current
- Not recorded
Where 37 can be used as the replacement
In these recorded relationships, 37 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 37.
Voltage - Triode (single)
The database records 37 as a possible replacement for76.
No special restrictions are recorded for this substitution.
| Specification | 37 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single) | Voltage - Triode (single) |
| Construction | Triode | Triode |
| Base | 5A | 6A |
| Socket | UX5 | UX5 |
| Base pins | 5 | 5 |
| 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 37 specifications →