Tube cross-reference
1K3A alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 1K3A rectifier - tv line scan boost. Compare core specifications and verify every restriction before using a replacement.
Where 1K3A can be used as the replacement
In these recorded relationships, 1K3A is the replacement tube. The listed original tubes are not automatically suitable as replacements for 1K3A.
Rectifier - TV Line Scan Boost
The database records 1K3A as a possible replacement for1B3GT.
No special restrictions are recorded for this substitution.
| Specification | 1K3A replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - TV Line Scan Boost | Rectifier - TV Line Scan Boost |
| Construction | Rectifier | Rectifier |
| Base | 3C | 3C |
| Socket | IO | IO |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 1.25 V | 1.25 V |
| Heater current | 0.2 A | 0.2 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 1K3A specifications →