Tube cross-reference
1664 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 1664 rectifier - half wave. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 1664
The following tubes are recorded as possible replacements for 1664. This direction does not establish that 1664 can replace them.
Voltage Radio Detector Converter
The database records 12C8 as a possible replacement for1664.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Half Wave | Voltage Radio Detector Converter |
| Construction | Rectifier | Diode-Diode-Pentode |
| Base | 2Z | 8E |
| Socket | Not recorded | Not recorded |
| Base pins | 2 | 8 |
| Sections | 1 | 3 |
| Heater voltage | 1.4 V | 12.6 V |
| Heater current | 0.05 A | 0.15 A |
Where 1664 can be used as the replacement
In these recorded relationships, 1664 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 1664.
Voltage Radio Detector Converter
The database records 1664 as a possible replacement for12C8.
No special restrictions are recorded for this substitution.
| Specification | 1664 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Half Wave | Voltage Radio Detector Converter |
| Construction | Rectifier | Diode-Diode-Pentode |
| Base | 2Z | 8E |
| Socket | Not recorded | Not recorded |
| Base pins | 2 | 8 |
| Sections | 1 | 3 |
| Heater voltage | 1.4 V | 12.6 V |
| Heater current | 0.05 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 1664 specifications →