Tube cross-reference
EM34 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the EM34 tuning indicator. Compare core specifications and verify every restriction before using a replacement.
Exact variations of EM34
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.
6CD7 Tuning Indicator
- Base
- 8EV
- Socket
- IO
- Base pins
- Not recorded
- Sections
- 2
- Heater voltage
- 6.3 V
- Heater current
- 0.2 A
Replacement tubes for EM34
The following tubes are recorded as possible replacements for EM34. This direction does not establish that EM34 can replace them.
Tuning Indicator
The database records 6CD7 as a possible replacement forEM34.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Tuning Indicator | Tuning Indicator |
| Construction | Triode-TuningIndicator | Triode-TuningIndicator |
| Base | Octal | 8EV |
| Socket | IO | IO |
| Base pins | 8 | Not recorded |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 A | 0.2 A |
Where EM34 can be used as the replacement
In these recorded relationships, EM34 is the replacement tube. The listed original tubes are not automatically suitable as replacements for EM34.
Tuning Indicator
The database records EM34 as a possible replacement for6CD7.
No special restrictions are recorded for this substitution.
| Specification | EM34 replacement | Original tube |
|---|---|---|
| Tube type | Tuning Indicator | Tuning Indicator |
| Construction | Triode-TuningIndicator | Triode-TuningIndicator |
| Base | Octal | 8EV |
| Socket | IO | IO |
| Base pins | 8 | Not recorded |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 A | 0.2 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 EM34 specifications →