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ECC804

Sensibly equivalent to:
6/30L2 6GA8 B729 CV5264
See also:
Valves and their Habits - Locked-Seam Cathodes
    
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The ECC804 Mullard Type designation is printed smaller than the 6/30L2 indicating that the 6/30L2 was an established design also made by Mullard. The valve is a general purpose double triode with a screen between the sections. The main application is in television receivers.
The grid is wound on copper supports and the central screen is left bright.
Seen face-on the cathode tube can be seen as a rectangle and looks to be of the locked-seam type.
The thin glass tube envelope is 20 mm in diameter, and excluding the B9A base pins is 48 mm tall.
References: Datasheet & 1040

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
a(2)
g1(2)
k(2)
h
h
a(1)
g1(1)
k(1)
s

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
6.3
0.3
200
-7.7
10.0
5.3k
3.4
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 26, 2014.
shape:thin.glass.tube construction:all.glass type:double.triode age:1950.1960 base:b9a heater:6.3v pins:9 pin:1.a(2) pin:2.g1(2) pin:3.k(2) pin:4.h pin:5.h pin:6.a(1) pin:7.g1(1) pin:8.k(1) pin:9.s
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