Tube cross-reference
E alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the E voltage - triode (single). Compare core specifications and verify every restriction before using a replacement.
Where E can be used as the replacement
In these recorded relationships, E is the replacement tube. The listed original tubes are not automatically suitable as replacements for E.
Specialized - Cathode Ray
The database records E as a possible replacement for20HP4.
No special restrictions are recorded for this substitution.
| Specification | E replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single) | Specialized - Cathode Ray |
| Construction | Triode | CathodeRay |
| Base | A | Not recorded |
| Socket | Not recorded | DUODECAL5 |
| Base pins | 4 | 12 |
| Sections | 1 | 1 |
| Heater voltage | 4 V | 6.3 V |
| Heater current | 0.7 A | 0.6 A |
Specialized - Cathode Ray
The database records E as a possible replacement for20HP4A.
No special restrictions are recorded for this substitution.
| Specification | E replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single) | Specialized - Cathode Ray |
| Construction | Triode | CathodeRay |
| Base | A | 12L |
| Socket | Not recorded | B12D |
| Base pins | 4 | 6 |
| Sections | 1 | 1 |
| Heater voltage | 4 V | 6.3 V |
| Heater current | 0.7 A | 0.6 A |
Specialized - Cathode Ray
The database records E as a possible replacement for20HP4B.
No special restrictions are recorded for this substitution.
| Specification | E replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single) | Specialized - Cathode Ray |
| Construction | Triode | CathodeRay |
| Base | A | Not recorded |
| Socket | Not recorded | B12D |
| Base pins | 4 | 12 |
| Sections | 1 | 1 |
| Heater voltage | 4 V | 6.3 V |
| Heater current | 0.7 A | 0.6 A |
Specialized - Cathode Ray
The database records E as a possible replacement for20HP4C.
No special restrictions are recorded for this substitution.
| Specification | E replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single) | Specialized - Cathode Ray |
| Construction | Triode | CathodeRay |
| Base | A | Not recorded |
| Socket | Not recorded | DUODECAL6 |
| Base pins | 4 | 12 |
| Sections | 1 | 1 |
| Heater voltage | 4 V | 6.3 V |
| Heater current | 0.7 A | 0.6 A |
Specialized - Cathode Ray
The database records E as a possible replacement for20HP4D.
No special restrictions are recorded for this substitution.
| Specification | E replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single) | Specialized - Cathode Ray |
| Construction | Triode | CathodeRay |
| Base | A | Not recorded |
| Socket | Not recorded | B12D |
| Base pins | 4 | 12 |
| Sections | 1 | 1 |
| Heater voltage | 4 V | 6.3 V |
| Heater current | 0.7 A | 0.6 A |
Specialized - Cathode Ray
The database records E as a possible replacement for20LP4.
No special restrictions are recorded for this substitution.
| Specification | E replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single) | Specialized - Cathode Ray |
| Construction | Triode | CathodeRay |
| Base | A | 12L |
| Socket | Not recorded | DUODECAL5 |
| Base pins | 4 | 6 |
| Sections | 1 | 1 |
| Heater voltage | 4 V | 6.3 V |
| Heater current | 0.7 A | 0.6 A |
Specialized - Cathode Ray
The database records E as a possible replacement for20MP4.
No special restrictions are recorded for this substitution.
| Specification | E replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single) | Specialized - Cathode Ray |
| Construction | Triode | CathodeRay |
| Base | A | Not recorded |
| Socket | Not recorded | B12D |
| Base pins | 4 | 12 |
| Sections | 1 | 1 |
| Heater voltage | 4 V | 6.3 V |
| Heater current | 0.7 A | 0.6 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 E specifications →