| Manufacturer | Part Number | Description |
|---|---|---|
Philips Semiconductors (now NXP Semiconductors)
| E810F | S.Q. Tube |
Siemens Semiconductor Group (now Infineon)
| E810F | Leistungspentode |
|
Philips Semiconductors (now NXP Semiconductors)
| E810F | Special Quality Long Life Pentode |
