Tube cross-reference
6487 alternatives, equivalents, and replacements
Review exact electrical variations and directional substitutions recorded for the 6487 voltage pentode or tetrode (with diode). Compare core specifications and verify every restriction before using a replacement.
Exact variations of 6487
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.
EF70 Voltage Pentode - High Frequency (single)
- Base
- Not recorded
- Socket
- WIRE8
- Base pins
- 8
- Sections
- 1
- Heater voltage
- 6.3 V
- Heater current
- 0.2 A
Replacement tubes for 6487
The following tubes are recorded as possible replacements for 6487. This direction does not establish that 6487 can replace them.
Voltage Pentode - High Frequency (single)
The database records EF70 as a possible replacement for6487.
No special restrictions are recorded for this substitution.
| Specification | Original tube | Replacement |
|---|---|---|
| Tube type | Voltage Pentode or Tetrode (with diode) | Voltage Pentode - High Frequency (single) |
| Construction | Diode-Pentode | Pentode |
| Base | 8FW | Not recorded |
| Socket | Not recorded | WIRE8 |
| Base pins | 8 | 8 |
| Sections | 2 | 1 |
| Heater voltage | 6.3 V | 6.3 V |
| Heater current | 0.2 A | 0.2 A |
Where 6487 can be used as the replacement
In these recorded relationships, 6487 is the replacement tube. The listed original tubes are not automatically suitable as replacements for 6487.
Voltage Pentode - High Frequency (single)
The database records 6487 as a possible replacement forEF70.
No special restrictions are recorded for this substitution.
| Specification | 6487 replacement | Original tube |
|---|---|---|
| Tube type | Voltage Pentode or Tetrode (with diode) | Voltage Pentode - High Frequency (single) |
| Construction | Diode-Pentode | Pentode |
| Base | 8FW | Not recorded |
| Socket | Not recorded | WIRE8 |
| Base pins | 8 | 8 |
| Sections | 2 | 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 6487 specifications →