The 6F12 is the Mazda version of the ubiquitous EF91 of the late 1940s. The 6F12 is a high gain, high impedance, high slope, screened pentode.The 6F12 was used in the 1948 Murphy V114 television receiver for RF and IF amplification.![](../pics/aaq0070a.jpg)
The construction matches the Mullard valve with small straps connection the anode plates.![](../pics/aaq0070b.jpg)
The grids in close-up. The space between cathode and anode is filled with the grids.The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 44 mm tall.References: Data-sheet & 1040 Type 6F12 was first introduced in 1948. See also 1948 adverts. |