Ferranti ECC83 F91- Code On Tube
- F91 B8J
- Country
- Great Britain
- Factory Code
- B - Mullard, Blackburn
- Glass Color
- Clear Glass
- Mica
- Double Mica
- Permanentid
- 58st4pzt
- Pin Color
- Silver Pins
- Plate Color
- Matte Gray
- Plate Look
- Ribbed / Scale
- Plate Size
- 17mm
- Tip Shape
- Pinched Tip
- Year
- 1958
Branded
