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1AB6

Sensibly equivalent to:
1C3 DK96 DK98 X25
See also:
Pentagrid Converters
    
Extras ▼

 

The 1AB6 is a heptode mixer for battery superhet receivers.
It is believed that Tungsram of Hungary had connections with the Philips organization. Mullard was a wholly owned Philips company and so it is possible that this valve was actually made at one of the Mullard factories. The 1AB6 is identical to the DK96.
The final series of battery valves were the ones that had the 25 mA oxide coated tungsten filaments.
The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 46 mm tall.
References: Datasheet & 1040. Type 1AB6 was first introduced in 1955.

 

Pin Connections
B7G
1
2
3
4
5
6
7
f-
a
g2
g1
g4
g3
f+,g5

 

Absolute Maximum Operating Conditions
Heptode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
1.4
0.025
85
68
0
0.6
0.14
0.8M
0.3
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 12, 2013.
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