Tube cross-reference
5718 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 5718 voltage - triode (single high frequency). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 5718
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.
Replacement tubes for 5718
The following tubes are recorded as possible replacements for 5718. This direction does not establish that 5718 can replace them.
Voltage - Triode (single high frequency)
The database records EC70 as a possible replacement for5718.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | WireLead | Not recorded |
| Socket | IO | WIRE8 |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.15 A |
Where 5718 can be used as the replacement
In these recorded relationships, 5718 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 5718.
Voltage - Triode (single high frequency)
The database records 5718 as a possible replacement forEC70.
No special restrictions are recorded for this substitution.
| Specification | 5718 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | WireLead | Not recorded |
| Socket | IO | WIRE8 |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.15 A |
Voltage - Triode (single high frequency)
The database records 5718 as a possible replacement forEC71.
No special restrictions are recorded for this substitution.
| Specification | 5718 replacement | Original tube |
|---|---|---|
| Tube type | Voltage - Triode (single high frequency) | Voltage - Triode (single high frequency) |
| Construction | Triode | Triode |
| Base | WireLead | Not recorded |
| Socket | IO | WIRE8 |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.15 A | 0.15 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 5718 specifications →