Tube cross-reference
6BA5 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6BA5 voltage pentode - sharp cutoff (single). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6BA5
The following tubes are recorded as possible replacements for 6BA5. This direction does not establish that 6BA5 can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records 5638 as a possible replacement for6BA5.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - Sharp Cutoff (single) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 5638 |
| Socket | B7G | SUBMINIATURE6 |
| Base pins | 7 | 6 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.15 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 6BA5 specifications →