Sensibly equivalent¶ to:
The ECH42 is a triode hexode mixer in an all glass envelope fitted with a B8A base and designed for radio receivers.
The base with 8 pointed pins equi-spaced around the circumference of the pin circle. A locating pip moulded into the 22 mm lower section can be seen in the centre of the picture.
See also UCH42 with a 100 mA heater for series heater chains.
The thin glass tube envelope is 20 mm in diameter, and excluding the B8A base pins is 54 mm tall.
References: Datasheet & 1040. Type ECH42 was first introduced in 1949.
Absolute Maximum Operating Conditions¶
Updated January 29, 2013. shape:thin.glass.tube construction:all.glass type:triode.hexode age:1940.1950 base:b8a heater:6.3v pins:8 pin:1.h pin:2.a pin:3.a(t) pin:4.g1(t).g3 pin:5.g2.g4 pin:6.g1 pin:7.k pin:8.h