Tube cross-reference
6689 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6689 voltage pentode. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6689
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.
E83F Voltage Pentode
- Base
- 9C12
- Socket
- B9A
- Base pins
- 9
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.3 A
Replacement tubes for 6689
The following tubes are recorded as possible replacements for 6689. This direction does not establish that 6689 can replace them.
Voltage Pentode
The database records E83F as a possible replacement for6689.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode |
| Construction | Pentode | Pentode |
| Base | Not recorded | 9C12 |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.3 A | 0.3 A |
Where 6689 can be used as the replacement
In these recorded relationships, 6689 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6689.
Voltage Pentode
The database records 6689 as a possible replacement forE83F.
No special restrictions are recorded for this substitution.
| Specification | 6689 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode | Voltage Pentode |
| Construction | Pentode | Pentode |
| Base | Not recorded | 9C12 |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| 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 6689 specifications →