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ECH84

Sensibly equivalent to:
6JX8
    
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The ECH84 is a low voltage triode heptode. The triode heptode was designed for noise immune TV sync separators.
See also the car radio frequency changer ECH83.
The thin glass tube envelope is 20 mm in diameter, and excluding the B9A base pins, is 59 mm tall.
References: Datasheet & 1040. Type ECH84 was first introduced in 1961.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
g3
g1
k,g5,s
h
h
a
g2,g4
a(t)
g1(t)

 

Absolute Maximum Operating Conditions
Heptode
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
6.3
0.3
135
14
0
1.7
0.9
2.2

 

Absolute Maximum Operating Conditions
Triode
Va
Vg
mAa
ra
gm
50
0
3.0
13.5k
3.7
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 07, 2013.
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