Tube cross-reference
1K3 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 1K3 rectifier - tv line scan boost. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 1K3
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.
1J3 Rectifier - TV Line Scan Boost
- Base
- 3C
- Socket
- IO
- Base pins
- 6
- Sections
- 1
- Heater voltage
- 1.25 V
- Heater current
- 0.2 A
Replacement tubes for 1K3
The following tubes are recorded as possible replacements for 1K3. This direction does not establish that 1K3 can replace them.
Rectifier - TV Line Scan Boost
The database records DY30 as a possible replacement for1K3.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - TV Line Scan Boost | Rectifier - TV Line Scan Boost |
| Construction | Rectifier | Rectifier |
| Base | 3C | Octal |
| Socket | IO | Not recorded |
| Base pins | 6 | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 1.25 V | 1.25 V |
| Heater current | 0.2 A | 0.2 A |
Rectifier - TV Line Scan Boost
The database records U41 as a possible replacement for1K3.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - TV Line Scan Boost | Rectifier - TV Line Scan Boost |
| Construction | Rectifier | Rectifier |
| Base | 3C | Not recorded |
| Socket | IO | IO |
| Base pins | 6 | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 1.25 V | 1.25 V |
| Heater current | 0.2 A | 0.2 A |
Where 1K3 can be used as the replacement
In these recorded relationships, 1K3 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 1K3.
Rectifier - TV Line Scan Boost
The database records 1K3 as a possible replacement for1B3GT.
No special restrictions are recorded for this substitution.
| Specification | 1K3 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 | 6 | 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 1K3 specifications →