Sensibly equivalent¶ to:
The 6AM6 and its clones were almost the universal amplifier pentode of the post war era, many manufacturers made versions of this standard valve. The version shown here was made by Brimar.
The construction differs from our other 8D3 and this may be the inclusion of the coating to reduce gas release from the glass. The October 1953 advert refers to an improved reliability design of the 6AM6/8D3 and the reduction of gas emission will increase service life.
The glass coating in areas not covered by the anode.
The thin glass tube envelope is 18 mm in diameter, and excluding the B7G base pins is 47 mm tall.
References: Data-sheet & 1040. Type 8D3 was first introduced in 1947.
Absolute Maximum Operating Conditions¶
Updated December08, 2015. shape:thin.glass.tube construction:all.glass type:pentode age:1940.1950 base:b7g heater:6.3v pins:7 pin:1.g1 pin:2.k pin:3.h pin:4.h pin:5.a pin:6.g3 pin:7.g2