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CV785

Sensibly equivalent to:
1F3 1T4 DF91 W17
See also:
1T4 Exploded
    
Extras ▼

 

The CV785 is the UK Government code for the commercial 1T4 and is a miniature screened pentode for dry battery operation. It was designed for radio reception and is a variable μ RF device and would be employed as an IF amplifier in most cases.
The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 45 mm tall.
References: Datasheet & 1040. Type CV785 was first introduced in 1947.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
1.4
0.05
90
67.5
0
3.5
1.5
0.5M
0.9
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 08, 2013.
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