Tube cross-reference
6664 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6664 voltage - triode (single). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6664
The following tubes are recorded as possible replacements for 6664. This direction does not establish that 6664 can replace them.
Voltage - Triode (single high frequency)
The database records 6AB4 as a possible replacement for6664.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | 7BD | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.15 A |
Where 6664 can be used as the replacement
In these recorded relationships, 6664 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6664.
Voltage - Triode (single high frequency)
The database records 6664 as a possible replacement for6AB4.
No special restrictions are recorded for this substitution.
| Specification | 6664 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | 7BD | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.15 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 6664 specifications →