Tube cross-reference
35 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 35 voltage tetrode. Compare core specifications and verify every restriction before using a replacement.
Exact variations of 35
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.
51 Voltage Tetrode
- Base
- 5E
- Socket
- UX5
- Base pins
- 5
- Sections
- 1
- Heater voltage
- 2.5 V
- Heater current
- 1.75 A
Replacement tubes for 35
The following tubes are recorded as possible replacements for 35. This direction does not establish that 35 can replace them.
Voltage Tetrode
The database records 24A as a possible replacement for35.
- Not suitable for all circuits
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Tetrode | Voltage Tetrode |
| Construction | Tetrode | Tetrode |
| Base | 5E | 5E |
| Socket | UX5 | UX5 |
| Base pins | 5 | 5 |
| Sections | 1 | 1 |
| Heater voltage | 2.5 V | 2.5 V |
| Heater current | 1.75 A | 1.75 A |
Voltage Tetrode
The database records 51 as a possible replacement for35.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Tetrode | Voltage Tetrode |
| Construction | Tetrode | Tetrode |
| Base | 5E | 5E |
| Socket | UX5 | UX5 |
| Base pins | 5 | 5 |
| Sections | 1 | 1 |
| Heater voltage | 2.5 V | 2.5 V |
| Heater current | 1.75 A | 1.75 A |
Where 35 can be used as the replacement
In these recorded relationships, 35 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 35.
Voltage Tetrode
The database records 35 as a possible replacement for24A.
- Not suitable for all circuits
| Specification | 35 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Tetrode | Voltage Tetrode |
| Construction | Tetrode | Tetrode |
| Base | 5E | 5E |
| Socket | UX5 | UX5 |
| Base pins | 5 | 5 |
| Sections | 1 | 1 |
| Heater voltage | 2.5 V | 2.5 V |
| Heater current | 1.75 A | 1.75 A |
Voltage Tetrode
The database records 35 as a possible replacement for51.
No special restrictions are recorded for this substitution.
| Specification | 35 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Tetrode | Voltage Tetrode |
| Construction | Tetrode | Tetrode |
| Base | 5E | 5E |
| Socket | UX5 | UX5 |
| Base pins | 5 | 5 |
| Sections | 1 | 1 |
| Heater voltage | 2.5 V | 2.5 V |
| Heater current | 1.75 A | 1.75 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 35 specifications →