Tube cross-reference
6488 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6488 voltage pentode - high frequency (single). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6488
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.
EF73 Voltage Pentode
- Base
- Not recorded
- Socket
- WIRE8
- Base pins
- 8
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.2 A
Replacement tubes for 6488
The following tubes are recorded as possible replacements for 6488. This direction does not establish that 6488 can replace them.
Voltage Pentode
The database records EF73 as a possible replacement for6488.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode - High Frequency (single) | Voltage Pentode |
| Construction | Pentode | Pentode |
| Base | 8FX | Not recorded |
| Socket | SUBMINIATURE8 | WIRE8 |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 A | 0.2 A |
Where 6488 can be used as the replacement
In these recorded relationships, 6488 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6488.
Voltage Pentode
The database records 6488 as a possible replacement forEF73.
No special restrictions are recorded for this substitution.
| Specification | 6488 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode - High Frequency (single) | Voltage Pentode |
| Construction | Pentode | Pentode |
| Base | 8FX | Not recorded |
| Socket | SUBMINIATURE8 | WIRE8 |
| Base pins | 8 | 8 |
| Sections | 1 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 A | 0.2 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 6488 specifications →