Sensibly equivalent¶ to:
1852 6AJ7 CV660 CV747 CV846 CV849 VT-112
The 6AC7 American metal pentode was designed for high gain amplification. Since it has a sharp cut-off it is unsuitable for domestic radios with AVC. Its intended application is as an IF or video amplifier for wide-band receivers, eg. radars. Bearing in mind that the RCA design of metal valves was pinchless and had very short lead-outs well shielded from each other by the metal envelope, Type 6AC7 can be thought of as the American answer to the EF50. It consumed 50% more heater power but provided 50% more gm as a result. It was used in enormous numbers in American WWII equipments. Presumably the accessible suppressor grid might be used to 'gate' the signal output if required.
See also 6AJ7 that has identical details.
The thin metal tube envelope is 25 mm in diameter and excluding the IO base pins, is 50 mm tall.
References: Datasheet & 1040.
Absolute Maximum Operating Conditions¶
Updated December03, 2012. shape:thin.metal.tube construction:glass.disc type:pentode age:1930.1940 base:io heater:6.3v pins:8 pin:1.m pin:2.h pin:3.g3 pin:4.g1 pin:5.k pin:6.g2 pin:7.7 pin:8.a