Tube cross-reference
6GM8 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6GM8 voltage - triode (under 100v). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6GM8
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.
ECC86 Voltage - Triode (under 100V)
- Base
- 9DE
- Socket
- B9A
- Base pins
- 9
- Sections
- 2
- Heater voltage
- 6.3 V
- Heater current
- 0.33 A
Replacement tubes for 6GM8
The following tubes are recorded as possible replacements for 6GM8. This direction does not establish that 6GM8 can replace them.
Voltage - Triode (under 100V)
The database records ECC86 as a possible replacement for6GM8.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (under 100V) | Voltage - Triode (under 100V) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9DE | 9DE |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.33 A | 0.33 A |
Where 6GM8 can be used as the replacement
In these recorded relationships, 6GM8 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6GM8.
Voltage - Triode (under 100V)
The database records 6GM8 as a possible replacement forECC86.
No special restrictions are recorded for this substitution.
| Specification | 6GM8 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (under 100V) | Voltage - Triode (under 100V) |
| Construction | Triode-Triode | Triode-Triode |
| Base | 9DE | 9DE |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.33 A | 0.33 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 6GM8 specifications →