Sensibly equivalent¶ to:
The 6F28 is an amplifier beam tetrode of high mutual conductance designed for television service and introduced by Thorn-AEI (Mazda) in 1961. It is also known as the EE80.
R J Sutherland points out that the tetrode section of the 30FL12 has identical electrical characteristics to the 6F28.
It was designed for use as a video output valve where the high mutual conductance makes it easier to achieve a reasonable stage gain and wide bandwidth.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 52 mm tall.
Reference: 1040. Type 6F28 was first introduced in 1961.
Absolute Maximum Operating Conditions¶
Updated February 19, 2014. shape:thin.glass.tube construction:all.glass type:beam.tetrode age:1960.1975 base:b9a heater:300ma pins:9 pin:1.ic pin:2.g1 pin:3.k pin:4.h pin:5.h pin:6.bp.s pin:7.a pin:8.g2 pin:9.-