OA90 Germanium signal diode. Package: glass DO-7 Download OA90 .pdf datasheet: Status: NOS (New Old Stock) in perfect condition note: these are dating from the 60's / 70's and so not cheap modern chinese imports. ( they won't however pick up 1960's broadcasts ! ) RoHS compliant: no For collectors and vintage radio specialists please see the genuine black Mullard OA90 diodes we have on offer. (these might well pick up 1960's broadcasts.... joke !) https://elecena.pl/product/28684579/oa90-germanium-signal-diode 2025-05-13 https://elecena.pl/product/28684579/oa90-germanium-signal-diode 2026-03-20