Tube cross-reference
25F5A alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 25F5A power - beam single (not sweep) (under 10w). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 25F5A
The following tubes are recorded as possible replacements for 25F5A. This direction does not establish that 25F5A can replace them.
Power - Beam Single (NOT sweep) (under 10W)
The database records 25F5 as a possible replacement for25F5A.
- No-warmup series circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Beam Single (NOT sweep) (under 10W) | Power - Beam Single (NOT sweep) (under 10W) |
| Construction | BeamPower | BeamPower |
| Base | Not recorded | Not recorded |
| Socket | B9A | Not recorded |
| Base pins | Not recorded | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 25 V | 25 V |
| Heater current | 0.15 A | 0.15 A |
Where 25F5A can be used as the replacement
In these recorded relationships, 25F5A is the replacement tube. The listed original tubes are not automatically suitable as replacements for 25F5A.
Power - Beam Single (NOT sweep) (under 10W)
The database records 25F5A as a possible replacement for25F5.
No special restrictions are recorded for this substitution.
| Specification | 25F5A replacement | Original tube |
|---|---|---|
| Tube type | Power - Beam Single (NOT sweep) (under 10W) | Power - Beam Single (NOT sweep) (under 10W) |
| Construction | BeamPower | BeamPower |
| Base | Not recorded | Not recorded |
| Socket | B9A | Not recorded |
| Base pins | Not recorded | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 25 V | 25 V |
| Heater current | 0.15 A | 0.15 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 25F5A specifications →