Tube cross-reference
3B2 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 3B2 rectifier - half wave. Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 3B2
The following tubes are recorded as possible replacements for 3B2. This direction does not establish that 3B2 can replace them.
Rectifier - TV Line Scan Boost
The database records 3A3C as a possible replacement for3B2.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Half Wave | Rectifier - TV Line Scan Boost |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | Not recorded |
| Socket | Not recorded | IO |
| Base pins | 8 | 6 |
| Sections | 1 | 1 |
| Heater voltage | 3.15 V | 3.15 V |
| Heater current | 0.22 A | 0.22 A |
Rectifier - TV Line Scan Boost
The database records 3CZ3A as a possible replacement for3B2.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Half Wave | Rectifier - TV Line Scan Boost |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | 8EZ |
| Socket | Not recorded | IO |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 3.15 V | 3.15 V |
| Heater current | 0.22 A | 0.48 A |
Rectifier - TV Line Scan Boost
The database records 3DB3 as a possible replacement for3B2.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Half Wave | Rectifier - TV Line Scan Boost |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | Not recorded |
| Socket | Not recorded | IO |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 3.15 V | 3.15 V |
| Heater current | 0.22 A | 0.245 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 3B2 specifications →