| Manufacturer | Part Number | Description |
|---|---|---|
Philips Semiconductors (now NXP Semiconductors)
| ECF801 | Triode - Pentode 1962 |
MAZDABELVU
| ECF801 | Triode - Pentode |
|
Philips Semiconductors (now NXP Semiconductors)
| ECF801 | Triode - Pentode 1969 |
RCA
| ECF801 | Triode Sharp-Cutoff Pentode |
