Wade Bequest: ORA triode radio valve
- PART OF:
- Wade Bequest collection of valves
- Made:
- England
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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.
