Tube cross-reference
6677 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6677 power - beam single (not sweep) (under 10w). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6677
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.
6CL6 Voltage Pentode - Sharp Cutoff (single)
- Base
- 9BV
- Socket
- B9A
- Base pins
- 9
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.65 A
Replacement tubes for 6677
The following tubes are recorded as possible replacements for 6677. This direction does not establish that 6677 can replace them.
Voltage Pentode - Sharp Cutoff (single)
The database records 6CL6 as a possible replacement for6677.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Beam Single (NOT sweep) (under 10W) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 9BV |
| Socket | IO | B9A |
| Base pins | 8 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.65 A | 0.65 A |
Where 6677 can be used as the replacement
In these recorded relationships, 6677 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6677.
Voltage Pentode - Sharp Cutoff (single)
The database records 6677 as a possible replacement for6CL6.
No special restrictions are recorded for this substitution.
| Specification | 6677 replacement | Original tube |
|---|---|---|
| Tube type | Power - Beam Single (NOT sweep) (under 10W) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 9BV |
| Socket | IO | B9A |
| Base pins | 8 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.65 A | 0.65 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 6677 specifications →