Point contact diode's colour rings - UK Vintage Radio Repair and Restoration Discussion Forum
OA 70, Tube OA70; Röhre OA 70 ID33694, Solid-State-Diode
Germanium Diode Oa 70 | vintage gold bonded germanium diode oa9 for stompbox or radio detector 1 99 picclick, oa 79 germanium contact point high frequency diode early flickr, 2x tungsram oa1180
OA70 PHILIPS Gold Bonded Germanium Diode
oa70 diode | eBay
MINI-RADIO AVÁNDARO, 1 TRANSISTOR, early 70's, Hecho en Mé… | Flickr
ゲルマニウムから単結晶シリコンなど!
Halbleiter: OA70 (OA 70) - GERMANIUM DIODE...
Germanium Diode Gallery
4no Mullard OA70 Diodes Made in Gt.britain Old Stock Germanium Diode for sale online | eBay
🇮🇹 Marco on Twitter: "with its OA70 black-painted glass contact-point Germanium diode... Thank you for sharing… "
i took a closer look at the germanium diode : electronics