Tube cross-reference
25L6 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 25L6 power - beam (not sweep). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 25L6
The following tubes are recorded as possible replacements for 25L6. This direction does not establish that 25L6 can replace them.
Power - Tetrode (NOT beam)
The database records KT32 as a possible replacement for25L6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Beam (NOT sweep) | Power - Tetrode (NOT beam) |
| Construction | BeamPower | Tetrode |
| Base | 7AC | Not recorded |
| Socket | IO | IO |
| Base pins | Not recorded | 8 |
| Sections | 1 | 1 |
| Heater voltage | 25 V | 26 V |
| Heater current | 0.3 A | 0.3 A |
Power - Beam (NOT sweep)
The database records 25L6G as a possible replacement for25L6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Beam (NOT sweep) | Power - Beam (NOT sweep) |
| Construction | BeamPower | BeamPower |
| Base | 7AC | Not recorded |
| Socket | IO | IO |
| Base pins | Not recorded | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 25 V | 25 V |
| Heater current | 0.3 A | 0.3 A |
Power - Beam (NOT sweep)
The database records 25L6GT as a possible replacement for25L6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Beam (NOT sweep) | Power - Beam (NOT sweep) |
| Construction | BeamPower | BeamPower |
| Base | 7AC | B7-7 |
| Socket | IO | IO |
| Base pins | Not recorded | 7 |
| Sections | 1 | 1 |
| Heater voltage | 25 V | 25 V |
| Heater current | 0.3 A | 0.3 A |
Power - TV Vertical Output
The database records 25W6GT as a possible replacement for25L6.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - Beam (NOT sweep) | Power - TV Vertical Output |
| Construction | BeamPower | BeamPower |
| Base | 7AC | 7AC |
| Socket | IO | IO |
| Base pins | Not recorded | 7 |
| Sections | 1 | 1 |
| Heater voltage | 25 V | 25 V |
| Heater current | 0.3 A | 0.3 A |
Where 25L6 can be used as the replacement
In these recorded relationships, 25L6 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 25L6.
Power - Beam (NOT sweep)
The database records 25L6 as a possible replacement for25L6G.
No special restrictions are recorded for this substitution.
| Specification | 25L6 replacement | Original tube |
|---|---|---|
| Tube type | Power - Beam (NOT sweep) | Power - Beam (NOT sweep) |
| Construction | BeamPower | BeamPower |
| Base | 7AC | Not recorded |
| Socket | IO | IO |
| Base pins | Not recorded | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 25 V | 25 V |
| Heater current | 0.3 A | 0.3 A |
Power - Beam (NOT sweep)
The database records 25L6 as a possible replacement for25L6GT.
No special restrictions are recorded for this substitution.
| Specification | 25L6 replacement | Original tube |
|---|---|---|
| Tube type | Power - Beam (NOT sweep) | Power - Beam (NOT sweep) |
| Construction | BeamPower | BeamPower |
| Base | 7AC | B7-7 |
| Socket | IO | IO |
| Base pins | Not recorded | 7 |
| Sections | 1 | 1 |
| Heater voltage | 25 V | 25 V |
| Heater current | 0.3 A | 0.3 A |
Power - TV Vertical Output
The database records 25L6 as a possible replacement for25W6GT.
No special restrictions are recorded for this substitution.
| Specification | 25L6 replacement | Original tube |
|---|---|---|
| Tube type | Power - Beam (NOT sweep) | Power - TV Vertical Output |
| Construction | BeamPower | BeamPower |
| Base | 7AC | 7AC |
| Socket | IO | IO |
| Base pins | Not recorded | 7 |
| Sections | 1 | 1 |
| Heater voltage | 25 V | 25 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 25L6 specifications →