Tube cross-reference
3BX6 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 3BX6 voltage pentode - high frequency (single). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 3BX6
The following tubes are recorded as possible replacements for 3BX6. This direction does not establish that 3BX6 can replace them.
Voltage Pentode - Remote Cutoff (single)
The database records 3BY7 as a possible replacement for3BX6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - High Frequency (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | Not recorded |
| Socket | B7G | B9A |
| Base pins | 7 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 3.4 V | 6.3 V |
| Heater current | 0.6 A | 0.6 A |
Where 3BX6 can be used as the replacement
In these recorded relationships, 3BX6 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 3BX6.
Voltage Pentode - Remote Cutoff (single)
The database records 3BX6 as a possible replacement for3BY7.
No special restrictions are recorded for this substitution.
| Specification | 3BX6 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - High Frequency (single) | Voltage Pentode - Remote Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | Not recorded |
| Socket | B7G | B9A |
| Base pins | 7 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 3.4 V | 6.3 V |
| Heater current | 0.6 A | 0.6 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 3BX6 specifications →