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EF86

Sensibly equivalent to:
6267 6BK8 6F22 CV2901 Z729
See also:
A Low Cost Amplifier
    
Extras ▼

 

The EF86 is the standard early stage audio pre-amplifier valve. This exhibit is branded with the name of a well known dealer, originally based in London and latterly in West Sussex. The actual manufacturer is not known.
The thin glass tube envelope is 20 mm in diameter and excluding the B9A base pins, is 47 mm tall.
References: Datasheet & 1040. Type EF86 was first introduced in 1953.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
g2
s
k
h
h
a
s
g3
g1

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vg
mAa
ra
gm
6.3
0.2
250
-5
4
2.5M
2
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 29, 2013.
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