| Manufacturer | Part Number | Description |
|---|---|---|
Philips Semiconductors (now NXP Semiconductors)
| ECC91 | Double Triode |
RFT
| ECC91 | Steile Doppeltriode |
|
RFT
| ECC91 | ECC91 |
Mullard
| ECC91 | Miniature VHF Double Triode |
|
Philips Semiconductors (now NXP Semiconductors)
| ECC91 | Double Triode 1954 |
|
Mullard
| ECC91 | Double Triode |
