Tube cross-reference
7645 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 7645 voltage dual tetrode. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 7645
The following tubes are recorded as possible replacements for 7645. This direction does not establish that 7645 can replace them.
Power - Pentode (NOT beam)
The database records 6939 as a possible replacement for7645.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Dual Tetrode | Power - Pentode (NOT beam) |
| Construction | Tetrode-Tetrode | Pentode-Rectifier |
| Base | Not recorded | 9HL |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 12.6 V |
| Heater current | 0.6 A | 0.3 A |
Where 7645 can be used as the replacement
In these recorded relationships, 7645 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 7645.
Power - Pentode (NOT beam)
The database records 7645 as a possible replacement for6939.
No special restrictions are recorded for this substitution.
| Specification | 7645 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Dual Tetrode | Power - Pentode (NOT beam) |
| Construction | Tetrode-Tetrode | Pentode-Rectifier |
| Base | Not recorded | 9HL |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 12.6 V |
| Heater current | 0.6 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 7645 specifications →