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DK91

Sensibly equivalent to:
1C1 1H33 1R5 CV782 X17
See also:
Pentagrid Converters
    
Extras ▼

 

The DK91 is a miniature B7G dry battery heptode, it was designed for frequency changer use in battery portable radio receivers. The valve was designed for self oscillating service.
The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 45 mm tall.
References: Datasheet & 1040. Type DK91 was first introduced in 1947.

 

Pin Connections
B7G
1
2
3
4
5
6
7
f-
a
g4,g4
g1
f-
g3
f+

 

Absolute Maximum Operating Conditions
Heptode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
1.4
0.05
90
67.5
0
1.6
3.2
0.6M
0.3
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 22, 2013.
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