Made in W.Germany by Telefunken.
Diamond logo on the bottom. The first type has 2 holes on each side of plate (top & bottom). Large print logo version. Maybe the most common tube. Great from Telefunken with warm sounding and very good Bass.
Nos in box.
Made in W.Germany by Telefunken.
Diamond logo on the bottom. The second type has 2 holes on each side of plate (centered). Small print logo version. Maybe the most commo tube.Different mica stripe on top. One of the best ECC83 ever made with detail sounding.
Nos in box.
Made in W.Germany by Telefunken.
Diamond logo on the bottom. The third type is similar to the first version but has 3 holes on each side of plate (top, middle & bottom). Large print logo version.Warm and balance sounding.
Nos in box.
Made in W.Germany by Telefunken.
Diamond logo on the bottom. Very nice tube.
Nos in box. Matched pair and quad are available.
Made in W.Germany by Siemens & Halske.
Triple mica and O-getter with douple supports.
They marked telefunken but made by Siemens. One of the great version. .
Great 12AU7s. Hard to find today. Very balanced and detailed sounding
Nos but no box. Matched pair are avaible.
Made in USA by Tung-Sol.
Long gray plate, D-Getter. Black glass. Eexcellent 12AU7 from USA.
Nos in original box. Matched pair are available.
Made in USA by Tung-Sol.
Long gray plate, D-Getter. Premium 12AU7.
Wide bandwidth, well balanced, excellent sound stage and air.Very good tube.
Nos in original box. Matched pair are available.
Made in USA.
Long gray plate, D-Getter. Premium 12AU7.
Wide bandwidth, well balanced, excellent sound stage and air.Very good tube.
Nos in original box. Matched pair are available.
Made in W.Germany by Valvo.
Gold pins version, Closed getter. Very rare today. Super balanced sounding.
Nos in original box. Matched pair are available.
Made in Hamburg - W.Germany by Valvo.
Gold pins, Pinched Waist and O-Getter with double support. One of the earliest 12AT7 in the world was introduced by Valvo. One of three highest grade 12AT7s (GEC A2900, Valvo 6021 Pinched Waist and Telefinken ECC801S). Great bass control and sweet midrange, very musical. Long life tube. Nos in box. Matched pair are available.