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DF96

Sensibly equivalent to:
1AJ4 1F1 W25
See also:
Mullard 25 mA Series Advert, November 1954
    
Extras ▼

 

The DF96 is an amplifier pentode for use in battery portable radio equipment, mainly domestic broadcast receivers.
By 1954 the transistor was the next approaching technology and the valve industry responded with a range of 25 mA filament valves.
The plain anode and on the glass the words Made in England and BVA.
The filament can be seen as a single vertical strand. The tensioning spring is just visible at the top under the getter holder.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 47 mm tall.
References: Datasheet. Type DF96 was first introduced in 1953.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
1.4
0.025
85
64
0
1.65
0.55
1M
0.85
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated March 10, 2018.
shape:thin.glass.tube construction:all.glass type:pentode age:1950.1960 base:b7g heater:1.4v pins:7 pin:1.f-.g3 pin:2.a pin:3.g2 pin:4.ic pin:5.f-.g3 pin:6.g1 pin:7.f+
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