Sensibly equivalent¶ to:
The 6267 is Tungsram's special quality implementation of the EF86. This signal pentode became the standard early stage audio pre-amplifier valve after it replaced the EF37A octal as a low noise pentode intended for use as a RC coupled AF voltage amplifier, particularly in the early stages of high gain audio amplifiers, microphone pre-amplifiers and magnetic tape recorders.
Through the perforated screen can be seen glimpses of the grids together with the straps that join the two halves of the anode.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 49 mm tall.
Reference: Data-sheet & 1040.
Absolute Maximum Operating Conditions¶
Updated July 25, 2020. shape:thin.glass.tube construction:all.glass type:pentode age:1950.1960 base:b9a heater:6.3v pins:9 pin:1.g2 pin:2.s pin:3.k pin:4.h pin:5.h pin:6.a pin:7.s pin:8.g3 pin:9.g1