| Manufacturer | Part Number | Description |
|---|---|---|
Philips Semiconductors (now NXP Semiconductors)
| E188CC | Special Quality Pentode |
|
Philips Semiconductors (now NXP Semiconductors)
| E188CC | S.Q. Tube |
Siemens Semiconductor Group (now Infineon)
| E188CC | Doppeltriode |
