Tube cross-reference
N339 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the N339 power - tv horizontal output (sweep). Compare core specifications and verify every restriction before using a replacement.
Where N339 can be used as the replacement
In these recorded relationships, N339 is the replacement tube. The listed original tubes are not automatically suitable as replacements for N339.
Power - TV Horizontal Output (sweep)
The database records N339 as a possible replacement for21A6.
No special restrictions are recorded for this substitution.
| Specification | N339 replacement | Original tube |
|---|---|---|
| Tube type | Power - TV Horizontal Output (sweep) | Power - TV Horizontal Output (sweep) |
| Construction | Pentode | Pentode |
| Base | Not recorded | 9AS |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 20 V | 21 V |
| Heater current | 0.3 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 N339 specifications →