The ECH11 is a triode hexode frequency changer for use in a superhet receiver.
We have the complete line-up of valves from the set this valve was used in. Frequency changer ECH11, IF amplifier EF11 x 2, demodulator, AGC detector and first audio stage EBC11, push-pull audio output EDD11 and rectifier EZ11.
The sides are painted plain black.
The wide metal tube envelope is 36 mm in diameter, and excluding the footless base pins is 42 mm tall.
Reference: Datasheet. Type ECH11 was first introduced in 1939.
Absolute Maximum Operating Conditions¶
Updated September 10, 2013. shape:wide.metal.tube construction:glass.disc type:triode.hexode age:1930.1940 base:footless heater:6.3v pins:8 pin:1.g2.g4 pin:2.g1 pin:3.k.m pin:4.a pin:5.h pin:6.h pin:7.g3.g1(t) pin:8.a(t)