| Manufacturer | Part Number | Description |
|---|---|---|
| Unknown Manufacturer | ECH42 | Triode Hexode / Frequency Changer |
| Unknown Manufacturer | ECH42 | Triode - Hexode / Frequency Changer |
| LA RADIOTECHNIQUE | ECH42 | Triode - Hexode |
Philips Semiconductors (now NXP Semiconductors)
| ECH42 | Triode - Hexode |
MAZDA BELVU
| ECH42 | Triode Hexode |
