PV5DE BBC Ediswan brass base top pip – Osram GEC type B brass base top pip – BBC Ediswan PV6DE brass base top pip
Ediswan BBC PV5DE GBP 450 pair.
Ediswan BBC PV6DE GBP 200.
Osram GEC type B balloon valve GBP 350.
Description
The Ediswan BBC type PV5DE is a dull output emitter dated 1924 and was the first of its kind.
The Ediswan BBC PV6DE is a low impedance audio output valve. This pattern dated 1925 is the early type made for the BBC.
Osram GEC type B balloon valve, top pip with brass base receiving valve horizontal plate, rare.
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