Tube cross-reference
6HU6 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6HU6 tuning indicator. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6HU6
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.
EM87 Tuning Indicator
- Base
- B9A
- Socket
- B9A
- Base pins
- 9
- Sections
- 2
- Heater voltage
- 6.3 V
- Heater current
- 0.3 A
Replacement tubes for 6HU6
The following tubes are recorded as possible replacements for 6HU6. This direction does not establish that 6HU6 can replace them.
Tuning Indicator
The database records EM87 as a possible replacement for6HU6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Tuning Indicator | Tuning Indicator |
| Construction | Triode-TuningIndicator | Triode-TuningIndicator |
| Base | Not recorded | B9A |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Where 6HU6 can be used as the replacement
In these recorded relationships, 6HU6 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6HU6.
Tuning Indicator
The database records 6HU6 as a possible replacement forEM87.
No special restrictions are recorded for this substitution.
| Specification | 6HU6 replacement | Original tube |
|---|---|---|
| Tube type | Tuning Indicator | Tuning Indicator |
| Construction | Triode-TuningIndicator | Triode-TuningIndicator |
| Base | Not recorded | B9A |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| 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 6HU6 specifications →