▼ Menu

ECC804

Sensibly equivalent to:
6/30L2 6GA8 B729 CV5264
See also:
Valves and their Habits - Locked-Seam Cathodes - Mazda TV Valves advert
    
Extras ▼

 

The Mazda original code was the 6/30L2 but here Mazda use the Mullard ECC804 as the Type designation. In the advert above this valve is described as exclusive to Thorn-AEI in 1963.
The design is a general purpose double triode with a screen between the sections. The main application is in television receivers.
The triodes lie in the same plane with the screen between them.
UK manufacture and a member of the BVA. The grid can be seen to be wound on copper supports.
The control grid wires can be seen to pass flat across the anode.
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 February 07, 2019.
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
Return to Main Index