| Manufacturer | Part Number | Description |
|---|---|---|
Mullard |
ECH35 | Triode - Hexode |
Philips Semiconductors (now NXP Semiconductors) |
ECH3 | Triode - Hexode |
| Unknown Manufacturer | ECH3 | Triode - Hexode |
|
Philips Semiconductors (now NXP Semiconductors) |
ECH35 | Triode - Hexode |
