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ECL82

Sensibly equivalent to:
6BM8 6PL12
See also:
The Stereoplex Amplifier
    
Extras ▼

 

The ECL82 is described by Mullard as an audio triode plus output pentode. This exhibit is an import that carries the name of the re-seller in the UK and ignores the original manufacturer's name
The triode section has a amplification factor of 70, and this valve was much used in record players with crystal pickups. The latter had a relatively high output and when coupled with the single ended pentode output stage made effectively a single valve design. Only a rectifier was required to complete the line-up.
The construction is as a beam tetrode. The electrostatic screen between the sections and the beam plates form a support for the getter holder at the top of the envelope. The full height triode is on the right.
The thin glass tube envelope is 22 mm in diameter and excluding the B9A base pins the valve is 69 mm long.
References: Datasheet & 1040. Type ECL82 was first introduced in 1956.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
g1(t)
k,g3,S
g1
h
h
a
g2
k(t)
a(t)

 

Absolute Maximum Operating Conditions
Tetrode
Vh
Ah
Va
Vs
Vg
mAa
gm
6.3
0.78
200
200
-16
35
6.4

 

Absolute Maximum Operating Conditions
Triode
Va
mAa
gm
100
3.5
2.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December14, 2015.
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