Tube cross-reference
21HB5 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 21HB5 power - tv horizontal output (sweep). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 21HB5
The following tubes are recorded as possible replacements for 21HB5. This direction does not establish that 21HB5 can replace them.
Power - TV Horizontal Output (sweep)
The database records 21HB5A as a possible replacement for21HB5.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Power - TV Horizontal Output (sweep) | Power - TV Horizontal Output (sweep) |
| Construction | BeamPower | BeamPower |
| Base | Not recorded | 12BJ |
| Socket | B9A | B12C |
| Base pins | 12 | 12 |
| Sections | 1 | 1 |
| Heater voltage | 21 V | 21 V |
| Heater current | 0.45 A | 0.45 A |
Where 21HB5 can be used as the replacement
In these recorded relationships, 21HB5 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 21HB5.
Power - TV Horizontal Output (sweep)
The database records 21HB5 as a possible replacement for21HB5A.
No special restrictions are recorded for this substitution.
| Specification | 21HB5 replacement | Original tube |
|---|---|---|
| Tube type | Power - TV Horizontal Output (sweep) | Power - TV Horizontal Output (sweep) |
| Construction | BeamPower | BeamPower |
| Base | Not recorded | 12BJ |
| Socket | B9A | B12C |
| Base pins | 12 | 12 |
| Sections | 1 | 1 |
| Heater voltage | 21 V | 21 V |
| Heater current | 0.45 A | 0.45 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 21HB5 specifications →