Sensibly equivalent¶ to:
15A2 41MPG A80 A80A CV3576 FC4 FCH MH4105 VHT4 X42
The MX40 is an 1934 heptode frequency changer or mixer. This example has the grey zinc paint metalising. The oscillator voltage was designed to be 10.0 V peak to peak.
The zinc paint carries the Marconi branding.
The balloon envelope is 44 mm in diameter and, excluding the B5 base pins, is 112 mm tall.
References: Datasheet, 1040 & 1043. Type MX40 was first introduced in 1934.
Absolute Maximum Operating Conditions¶
Updated December27, 2014. shape:balloon construction:pinch type:heptode age:1930.1940 base:b7 heater:4.0v pins:7 pin:1.g2 pin:2.g1 pin:3.g3.g5 pin:4.h pin:5.h pin:6.m.k pin:7.a pin:tc.g4