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EAF42

Sensibly equivalent to:
6CT7 CV3883 W150
See also:
Mullard EAF42 & UAF42 Advert
    
Extras ▼

 

The EAF42 is a single diode variable μ pentode with a common cathode. Mullard describe this valve as: A single diode RF pentode for use in AC mains-operated equipment. The pentode section is suitable for automatic volume control.
This says British Made but has the distinctive Philips Dutch machinery produced glass foot with the groove.
See also EAF42 for another spigotless version.
The mesh screen obscures the pentode section.
The diode section sits above the pentode around the common cathode.
The thin glass tube envelope is 20 mm in diameter and, excluding the B8A base pins, is 53 mm tall.
References: Datasheet, 3002 & 1040. Type EAF42 was first introduced in 1948.

 

Pin Connections
B8A
1
2
3
4
5
6
7
8
h
a
a(d)
g3
g2
g1
k,s
h

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.2
250
85
-2.0
5.0
1.5
1.4M
2.0

 

Absolute Maximum Operating Conditions
Diode
Va
mAa
200
0.8
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated March 04, 2015.
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