Tube cross-reference
6663 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6663 diode (not rectifier). Compare core specifications and verify every restriction before using a replacement.
Replacement tubes for 6663
The following tubes are recorded as possible replacements for 6663. This direction does not establish that 6663 can replace them.
Diode (NOT rectifier)
The database records 5726 as a possible replacement for6663.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Diode (NOT rectifier) | Diode (NOT rectifier) |
| Construction | Diode-Diode | Diode-Diode |
| Base | Not recorded | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.3 A |
Diode (NOT rectifier)
The database records 6058 as a possible replacement for6663.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Diode (NOT rectifier) | Diode (NOT rectifier) |
| Construction | Diode-Diode | Diode-Diode |
| Base | Not recorded | 6BT |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.3 A |
Diode (NOT rectifier)
The database records 6097 as a possible replacement for6663.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Diode (NOT rectifier) | Diode (NOT rectifier) |
| Construction | Diode-Diode | Diode-Diode |
| Base | Not recorded | Not recorded |
| Socket | B7G | IO |
| Base pins | 7 | 8 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.3 A |
Diode (NOT rectifier)
The database records 6AL5 as a possible replacement for6663.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Diode (NOT rectifier) | Diode (NOT rectifier) |
| Construction | Diode-Diode | Diode-Diode |
| Base | Not recorded | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.3 A |
Diode (NOT rectifier)
The database records 6AL5W as a possible replacement for6663.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Diode (NOT rectifier) | Diode (NOT rectifier) |
| Construction | Diode-Diode | Diode-Diode |
| Base | Not recorded | 9M |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.3 A |
Where 6663 can be used as the replacement
In these recorded relationships, 6663 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6663.
Diode (NOT rectifier)
The database records 6663 as a possible replacement for6AL5.
No special restrictions are recorded for this substitution.
| Specification | 6663 replacement | Original tube |
|---|---|---|
| Tube type | Diode (NOT rectifier) | Diode (NOT rectifier) |
| Construction | Diode-Diode | Diode-Diode |
| Base | Not recorded | E7-1 |
| Socket | B7G | B7G |
| Base pins | 7 | 7 |
| Sections | 2 | 2 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 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 6663 specifications →