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ECH11

 
    
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The ECH11 is a triode hexode mixer, for superhet receivers, on a continental footless base. The Footless bas popular on the continent during WWII and used extensively by the German military. The naming convention and pin numbering matches the Mullard/Philips one. Mullard being the UK subsidiary, by then, of Philips of Eindhoven (Holland).
The wide metal tube envelope is 35 mm in diameter and, excluding the Footless base pins, is 35 mm tall.
References: Datasheet. Type ECH11 was first introduced in 1939.

 

Pin Connections
Footless
1
2
3
4
5
6
7
8
g2,g4
g1
k,M
a
h
h
g3,g1(t)
a(t)

 

Absolute Maximum Operating Conditions
Hexode
Vh
Ah
Va
Vs
mAa
ra
gm
6.3
0.2
250
100
3.2
1.5M
0.75
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December29, 2012.
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