Tube cross-reference
8448 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 8448 power - pentode single (not beam) (under 10w). Compare core specifications and verify every restriction before using a replacement.
Where 8448 can be used as the replacement
In these recorded relationships, 8448 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 8448.
Voltage Pentode - Sharp Cutoff (single)
The database records 8448 as a possible replacement for12BY7.
No special restrictions are recorded for this substitution.
| Specification | 8448 replacement | Original tube |
|---|---|---|
| Tube type | Power - Pentode Single (NOT beam) (under 10W) | Voltage Pentode - Sharp Cutoff (single) |
| Construction | Pentode | Pentode |
| Base | Not recorded | Not recorded |
| Socket | B9A | B9A |
| Base pins | 9 | 9 |
| Sections | 1 | 1 |
| Heater voltage | 13.5 V | 12.6 V |
| Heater current | 0.26 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 8448 specifications →