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