Wade Bequest collection of valves: Mullard ORA triode radio valve. ORA = oscillate, rectify, amplify. With BBC stamp. S/N: H204. With B4-2 base and top seal. Early dull emitter triode. Paper label: W29.
Details
- Category:
- Electronic Components
- Object Number:
- 1972-343/108
- type:
- triode valve
- credit:
- Wade, J.C.F.