Tube cross-reference
6R3 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6R3 rectifier - damper diode. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6R3
These designations belong to the same electrical variation group. Their names may differ because of international standards, manufacturing tolerances, or materials, but they are recorded as electrically equivalent—not merely substitutes.
EY81 Rectifier - Damper Diode
- Base
- Noval
- Socket
- B9A
- Base pins
- 9
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.81 A
Replacement tubes for 6R3
The following tubes are recorded as possible replacements for 6R3. This direction does not establish that 6R3 can replace them.
Rectifier - Damper Diode
The database records EY81 as a possible replacement for6R3.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | Noval |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.81 A | 0.81 A |
Rectifier - Damper Diode
The database records EY83 as a possible replacement for6R3.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | Not recorded |
| Socket | B9A | B9A |
| Base pins | Not recorded | Not recorded |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.81 A | 1 A |
Rectifier - Damper Diode
The database records EY88 as a possible replacement for6R3.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | 9CB |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.81 A | 1.55 A |
Rectifier - Damper Diode
The database records 6AF3 as a possible replacement for6R3.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | Not recorded |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.81 A | 1.2 A |
Rectifier - Damper Diode
The database records 6AL3 as a possible replacement for6R3.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | 9C6 |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.81 A | 1.55 A |
Rectifier - Damper Diode
The database records 6BR3 as a possible replacement for6R3.
- Parallel heater circuits only
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | E9-11 |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.81 A | 1.2 A |
Where 6R3 can be used as the replacement
In these recorded relationships, 6R3 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6R3.
Rectifier - Damper Diode
The database records 6R3 as a possible replacement forEY81.
No special restrictions are recorded for this substitution.
| Specification | 6R3 replacement | Original tube |
|---|---|---|
| Tube type | Rectifier - Damper Diode | Rectifier - Damper Diode |
| Construction | Rectifier | Rectifier |
| Base | Not recorded | Noval |
| Socket | B9A | B9A |
| Base pins | Not recorded | 9 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.81 A | 0.81 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 6R3 specifications →