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6J6

Sensibly equivalent to:
CV858 ECC91
    
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The 6J6 is an American design and this is a Cossor version with the same electrical characteristics. The 6J6 miniature double triode was designed for VHF signal amplification.
The construction has a common flattened tube cathode, with the control grids either side. The anodes are U channel sections either side of the central cathode.
The grids are wider than the anode as the wires are bent forward of the supports to get the grid close to the cathode.
A closer view of the construction. The grid supports are copper for good heat transfer. The anode can be seen to protrude forward of the grid supports. Effectively two planar triodes have been formed.
See 6J6 for full details.
The thin glass tube envelope is 18 mm diameter and 45 mm high excluding the B7G base pins.
References: Datasheet & 1040. Type 6J6 was first introduced in 1956.

 

Pin Connections
B7G
1
2
3
4
5
6
7
a(2)
a(1)
h
h
g(1)
g(2)
k

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
6.3
0.45
100
-0.85
8.5
7100
5.3
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 02, 2013.
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