The 12AX7 is a high impedance amplifier triode and equivalent to the Mullard ECC83 where full details can be found. Colomor imported and distributed foreign valves.![](../pics/aam0038a.jpg)
The anodes are folded and stitch on one side. This flange provides additional heat sinking and a point to attach the support.![](../pics/aam0038b.jpg)
The central column is a support for the getter holder.The thin glass tube envelope is 21 mm in diameter, and excluding the B9A base pins is 48 mm tall.References: Data-sheet, 3002 & 1040. Type 12AX7 was first introduced in 1947. See also 1947 adverts. |