Tube cross-reference
501R alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 501R power - triode (over 1000v 100w). Compare core specifications and verify every restriction before using a replacement.
Where 501R can be used as the replacement
In these recorded relationships, 501R is the replacement tube. The listed original tubes are not automatically suitable as replacements for 501R.
Power - Triode (over 1000V 100W)
The database records 501R as a possible replacement for5759.
No special restrictions are recorded for this substitution.
| Specification | 501R replacement | Original tube |
|---|---|---|
| Tube type | Power - Triode (over 1000V 100W) | Power - Triode (over 1000V 100W) |
| Construction | Triode | Triode |
| Base | Not recorded | Not recorded |
| Socket | Not recorded | Not recorded |
| Base pins | Not recorded | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 7.5 V | 7.5 V |
| Heater current | 24 A | 24 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 501R specifications →